Exodus 18:6

18:6 He said to Moses, “I, your father-in-law Jethro, am coming to you, along with your wife and her two sons with her.”

Exodus 27:7

27:7 The poles are to be put into the rings so that the poles will be on two sides of the altar when carrying it.

Exodus 28:9

28:9 “You are to take two onyx stones and engrave on them the names of the sons of Israel,

Exodus 29:38

29:38 “Now this is what you are to prepare on the altar every day continually: two lambs a year old.