Numbers 8:22

8:22 After this, the Levites went in to do their work in the tent of meeting before Aaron and before his sons. As the Lord had commanded Moses concerning the Levites, so they did.

Numbers 22:20

22:20 God came to Balaam that night, and said to him, “If the men have come to call you, get up and go with them; but the word that I will say to you, that you must do.”