Numbers 21:13

21:13 From there they moved on and camped on the other side of the Arnon, in the wilderness that extends from the regions of the Amorites, for Arnon is the border of Moab, between Moab and the Amorites.

Numbers 22:11

22:11 “Look, a nation has come out of Egypt, and it covers the face of the earth. Come now and put a curse on them for me; perhaps I will be able to defeat them and drive them out.”

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.