Numbers 3:6

3:6 “Bring the tribe of Levi near, and present them before Aaron the priest, that they may serve him.

Numbers 8:25

8:25 and at the age of fifty years they must retire from performing the work and may no longer work.

Numbers 18:22

18:22 No longer may the Israelites approach the tent of meeting, or else they will bear their sin and die.

Numbers 20:20

20:20 But he said, “You may not pass through.” Then Edom came out against them with a large and powerful force.

Numbers 22:19

22:19 Now therefore, please stay the night here also, that I may know what more the Lord might say to me.”