Here is my summary of Exodus chapters 15 - 23:
After the Egyptian army was destroyed in the Red Sea, Moses led the Israelites into the Desert of Shur, where they cold not find any water for three days. When they finally found some water in Marah they could not drink it because it was bitter. God showed Moses a stick, which he threw into the water and made it sweet. God then told the people if they listen to him and pay attention to his commands, he will not send any sickness on them like he sent on the Egyptians.
About 75 days after they left Egypt, the Israelites came to the Desert of Sin. They complained to Moses and Aaron about lack of food, so God told Moses he would rain down bread from heaven that the people would have to gather in the mornings. However, God said on the sixth day they had to gather twice as much as on the other days, so they could rest on the seventh day and keep the Sabbath holy. God also gave them meat (quail) to eat in the evenings. The bread they baked was called manna, and they lived on that for 40 years until they came to the land of Canaan.
The Israelites traveled from place to place, and when they camped at Rephidim there was no water to drink. Moses asked God for help, and God told Moses to take some of the elders and hit the rock at Mount Horeb with his wooden staff, which would make water flow from it. Also while at Rephidim, the Israelites were attacked by the Amalekites. Joshua and some of the men defeated the Amalekites, then God said he would completely erase the memory of Amalekites from the earth.
Moses' father-in-law Jethro came to visit Moses in the desert. After Moses told Jethro what happened to the Egyptians because God loved Israel so much, Jethro was delighted and said he now knows that the Lord is greater than all the other gods. The next day Jethro watched Moses serve as judge all day. Jethro told Moses he should choose some men to serve as judges over smaller groups of people, so they can decide the easy cases and only bring the hard cases to Moses.
Three months after they left Egypt, the Israelites camped in the Desert of Sinai, in front of the mountain. God called to Moses from the mountain and told Moses to tell the people they had seen what he did to Egypt and how he brought them out of Egypt. God said if they obeyed him and kept his covenant, they would be his holy nation. After Moses told this to the Israelites and reported back to God that they would obey, God gave Moses the Ten Commandments, which are (Exodus Chapter 20):
- You shall have no other gods before me.
- You shall not worship false idols. (God said he would punish four generations of descendents of those who hated him.)
- You shall not misuse the name of the Lord your God.
- Remember the Sabbath day by keeping it holy (no working).
- Honor your father and mother.
- You shall not murder.
- You shall not commit adultery.
- You shall not steal.
- You shall not give false testimony againsty your neighbor.
- You shall not covet anything that belongs to your neighbor.
Over the next several chapters (21 - 23), God gave Moses some additional laws on various subjects. These laws dealt with Hebrew servants, personal injuries, protection of property, social responsibility, justice and mercy, Sabbath laws, and three annual festivals. At the end of chapter 23, God tells the Israelites he is sending an angel ahead of them to help drive out their enemies in Canaan. God tells the Israelites not to worship any of the Gods of their enemies, and in return he would bless their food and water, and take away sickness, miscarriages and infertility. God also describes the borders he will establish for their land.