Numbers 1:5

1:5 Now these are the names of the men who are to help ¹  you:

from ²  Reuben, Elizur son of Shedeur;

Numbers 1:20

1:20 And they were as follows:

The descendants of Reuben, the firstborn son of Israel: According to the records of their clans and families, all the males twenty years old or older who could serve in the army were listed by name individually.

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¹ tn The verb is עָמַד (’amad, “to stand”). It literally then is, “who will stand with you.” They will help in the count, but they will also serve as leaders as the camp moves from place to place.

² tn The preposition lamed (ל) prefixed to the name could be taken in the sense of “from,” but could also be “with regard to” (specification).