1. The Lord provides water, manna, and quail for the children of Israel.

Exodus 15:24 The people murmured against Moses

Exodus 16:1–35; 17:1–7. What Lessons Did God Seek to Teach Israel by the Way He Gave Them Water and Manna?
‘“The manna was used by God to teach lessons for spiritual instruction as well as physical sustenance. Israel was told that with the failure of other food (‘suffered thee to hunger’), His provision of manna was to ‘make thee know that man doth not live by bread only, but by every word that proceedeth out of the mouth of the Lord doth man live’ [Deuteronomy 8:3, see v. 16]. God used the provision of manna on six days and not the seventh to teach Israel obedience, and convicted them of disobedience [see Exodus 16:19, see vv. 20, 25–30]. Jesus Christ uses the manna, God-given ‘bread from heaven’, as a type of Himself, the true bread of life, and contrasts the shadow with the substance: ‘your fathers did eat manna in the wilderness, and are dead’ [John 6:49], but He could say, ‘I am the bread of life … which came down from heaven; if any man eat of this bread, he shall live for ever’ [John 6:35, 51; see vv. 26–59].” (Douglas, New Bible Dictionary, s.v. “manna,” p. 780.)
Paul’s statement in 1 Corinthians 10:1–4 makes clear what the Lord was seeking to teach Israel regarding Christ when He provided both manna and water for them. Elder Bruce R. McConkie’s commentary on Paul’s statement is very enlightening:
“Christ is the bread which came down from heaven, the Bread of Life, the spiritual manna, of which men must eat to gain salvation. (John 6:31–58.) He is the spiritual drink, the living water, the water of life, which if men drink they shall never thirst more. (John 4:6–15.)” (Doctrinal New Testament Commentary, 2:355.)
The “hidden manna” mentioned by John in Revelation 2:17 was explained by Elder McConkie as being “the bread of life, the good word of God, the doctrines of Him who is the Bread of Life—all of which is hidden from the carnal mind. Those who eat thereof shall never hunger more; eternal life is their eventual inheritance.” (Doctrinal New Testament Commentary, 3:451.)’ (Institute Old Testament Manual)
2. Aaron and Hur hold up Moses’ hands so Israel prevails in battle against Amalek. Moses follows Jethro’s counsel to appoint judges and delegate authority to them.
Exodus 17:8-13 Aaron and Hur uphold Moses’ hands so that Joshua prevails against Amalek.
‘I think we could learn a lesson from the story that we read in the book of Exodus (Ex. 17:8-13 )in the life of Moses the prophet. You will recall that Amalek had come upon Israel, and Joshua was commanded by Moses to go out with his army. He said to Joshua, “I will stand upon the mount with the rod of the Lord in my hand, and you go fight the battles of Israel.” And as long as he stood with his hands upraised Israel prevailed against the enemy, but his hands became heavy and he could not hold them up, and when he would drop his hands, the enemy prevailed over Israel. And so they sat him upon a rock upon the Mount, and Aaron and Hur stood holding his hands upraised, that Israel would prevail in that terrible day.
That also is not without its shadow today and its lesson to Israel. Here sits today on this stand the man as President of this Church who holds in his hand the rod of the Lord; he is sitting upon the mount, and as long as his hands are upheld by obedience to his direction and his counsel, Israel will prevail against her enemies. But whenever we come to a time when we allow his hands to fall, and we as the Priesthood of the living God fail to uphold his hands, just in that day we may expect our enemies to come upon us and to destroy us.’ (Harold B Lee, General Conference, April 1943)
Exodus 18 Jethro counsels Moses
“Jethro made a valuable contribution to Moses in suggesting an organization of leaders over units of ten, fifty, one hundred and one thousand to instruct and to judge the people in all but the most difficult of matters, which would be passed up through the system of inferior and superior courts if necessary, until they reached Moses at the head. Moses showed commendable humility and wisdom in accepting the old Priest’s advice. (A modern use of the same type of organization is seen in D&C 136.)” (Rasmussen, Introduction to the Old Testament, 1:82–83.)
Joseph Smith changed Exodus 18:1 to read “the highpriest of Midian” (emphasis added), confirming what is recorded in Doctrine and Covenants 84:6–7, that Jethro held the Melchizedek Priesthood.’ (Institute Old Testament Manual)
3. The Lord meets with Moses on Mount Sinai and gives Israel the Ten Commandments.

Exodus 19:5. A “Peculiar” People
‘Today the word peculiar is used to mean something different and unusual. Since Israel was to be a peculiar people in this sense also, Exodus 19:5 and similar scriptures (see Deuteronomy 14:2; 1 Peter 2:9) are often read in that way. The original word in both Hebrew and Greek, however, means “property, wealth, private property, which is laid up or reserved; the leading idea is that of select, precious, endeared; something exceedingly prized and [diligently] preserved” (Wilson, Old Testament Word Studies, s.v. “peculiar,” p. 305).’ (Institute Old Testament Manual)
Exodus 19:7-13 The Lord covenants to make Israel a peculiar treasure, a kingdom of priests, and a holy nation
‘At this point the Lord wanted to reform the Israelites’ lives, bestow upon them the greater, or Melchizedek, priesthood, establish a holy Temple, and give them a sacred endowment. Had the Israelites followed the Lord’s instructions and accepted all the privileges offered them, they could have received the grandest of all revelations: they could have seen the Lord, heard him speak to Moses, known for themselves about his will and his law, comprehended Moses’ future revelations from God (Deut 4:10), and been translated as other communities had (JST Gen 14:32-34). There was a need for cleanliness and dedication in preparing for this great spiritual experience.
At first Israel accepted and committed themselves to the Lord’s intended plan. ‘All that the Lord has spoken we will do.’ (v8). But something was amiss – a fact we are not made aware of until the next chapter, when we see Israel retreating or shrinking from their opportunities (Exodus 20:19)’ (Andrew C Skinner and D Kelly Ogden, Verse by Verse, The Old Testament)
Exodus 19:9 A thick cloud
‘The Jews consider this as the fullest evidence their fathers had of the Divine mission of Moses; themselves were permitted to see this awfully glorious sight, and to hear God himself speak out of the thick darkness: for before this, as Rabbi Maymon remarks, they might have thought that Moses wrought his miracles by sorcery or enchantment; but now, hearing the voice of God himself, they could no longer disbelieve nor even doubt.’ (Clarke’s Commentary on t.he Bible)
Exodus 20:8 Remember the Sabbath day
4. The Lord introduces the law of Moses.
Exodus 32:1–6. Why Did the Israelites Desire to Worship a Gold Calf?
“The whole of this is a most strange and unaccountable transaction. Was it possible that the people could have so soon lost sight of the wonderful manifestations of God upon the mount? Was it possible that Aaron could have imagined that he could make any god that could help them? And yet it does not appear that he ever remonstrated with the people! Possibly he only intended to make them some symbolical representation of the Divine power and energy, that might be as evident to them as the pillar of cloud and fire had been, and to which God might attach an always present energy and influence; or in requiring them to sacrifice their ornaments, he might have supposed they would have desisted from urging their request: but all this is mere conjecture, with very little probability to support it. It must however be granted that Aaron does not appear to have even designed a worship that should supersede the worship of the Most High; hence we find him making proclamation, To-morrow is a feast to theLord [Jehovah], and we find farther that some of the proper rites of the true worship were observed on this occasion, for they brought burnt-offerings and peace-offerings, ver. 6, 7: hence it is evident he intended that the true God should be the object of their worship, though he permitted and even encouraged them to offer this worship through an idolatrous medium, the molten calf.” (Clarke, Bible Commentary, 1:463–64.)