24 Build an altar and sacrifice sheep and oxen to me as burnt offerings and peace offerings.
Do this everywhere you go, and I'll bless you for it.
26 Don't go up steps to the altar, so no one will discover your nakedness.
A few more words about this episode
Mount Sinai (19:1)
Mount Sinai may or may not be the same mountain that Moses first met God in the burning bush (See Episode 24), but they are in the same area - the southern tip of the Sinai peninsula.
Moses climbed the mountain again. (19:8)
Moses, who was 80 years old at the time, went up and down the mountain at least four in Exodus 19, delivering short messages from God to the people, and vice versa. It is a rugged mountain that is 2,285 meters high. The hike from St. Catherine's monastery, where the hike usually begins, is about a 10 km long, with an elevation gain of 750 m (on what is called "the camel trail"). It usually takes about 4 1/2 hours to climb.
God spoke all these words (20:1)
"These words" are generally considered to be The Ten Commandments.
But the text doesn't call this un-numbered list "The Ten Commandments"; it only says that "these words" were spoken by God.
And while the three main groups of Bible believers (Catholics, Protestants, and Jews) agree on the number of commandments in the ten commandments, they disagree on the numbering. See here for more about these differences.
Don't have any gods before me. (20:3)
Notice that God doesn't claim to be the only god, or command us to believe only in him. He only insists that we don't put any other gods before him.
Don't make a likeness of anything. (20:4)
Obeying this commandment would ban all art or photography.
I am a jealous God, punishing children for what their fathers did, to the third and fourth generation. (20:5)
Jealous, vicious, and insanely unjust. Who else but the Biblical God would ever say such a thing?
Honor your father and mother. (20:12)
This and the next four commandments are the first good things I've been able to find in the Bible. (And I have some serious reservations about each of them.)