Numbers 3:15

3:15 “Number the Levites by their clans ¹  and their families; every male from a month old and upward you are to number.” ² 

Numbers 3:20

3:20 The sons of Merari by their families were Mahli and Mushi. These are the families of the Levites by their clans.

¹ tn Heb “the house of their fathers.” So also in v. 20.

² tn Heb “you are to/shall number them.”