Numbers 17:2

17:2 “Speak to the Israelites, and receive from them a staff from each tribe, one from every tribal leader, twelve staffs; you must write each man’s name on his staff.

Numbers 18:26

18:26 “You are to speak to the Levites, and you must tell them, ‘When you receive from the Israelites the tithe that I have given you from them as your inheritance, then you are to offer up from it as a raised offering to the Lord a tenth of the tithe.