What are God's rules called?

You must be thinking of the 10 commandments.

1) "I am the Lord your God" is our reminder to be aware of God constantly.
2) "You shall not have other gods" means not to make anything other than God too important. Example: not to "worship the almighty dollar" or anything other than God.
3) "You shall not use God's name needlessly" teaches us to deal with God's names with the utmost reverence.
4) "Remember the Sabbath day, including to prepare for the holy day properly (nice clothes, food ready, etc.). The Sabbath is a testimony to the Exodus and to the Creation of the world (Exodus 20:10; Deuteronomy 5:14).
5) "Honor your father and mother": to do our best to honor and assist them; and to avoid being cheeky to them. No "generation gap" should be allowed to spoil family ties.
6) Do not kill: also hints at avoiding character assassination or endangering someone. Slander is forbidden even when it's not untrue.
7) Do not commit adultery: flirting is playing with fire.
8) Do not steal: even a paperclip should not be filched.
9) Do not bear false witness.
10) Do not covet: to avoid jealousy and gazing longingly at what is not ours. To realize that the other fellow's possessions have been allotted to him by God.