Numbers 2:34

2:34 So the Israelites did according to all that the Lord commanded Moses; that is the way they camped under their standards, and that is the way they traveled, each with his clan and family.

Numbers 8:20

8:20 So Moses and Aaron and the entire community of the Israelites did this with the Levites. According to all that the Lord commanded Moses concerning the Levites, this is what the Israelites did with them.

Numbers 9:5

9:5 And they observed the Passover on the fourteenth day of the first month at twilight in the wilderness of Sinai; in accordance with all that the Lord had commanded Moses, so the Israelites did.

Numbers 30:2

30:2 If a man makes a vow to the Lord or takes an oath of binding obligation on himself, he must not break his word, but must do whatever he has promised.