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 7:35

7:35 and for the sacrifice of peace offerings: two bulls, five rams, five male goats, and five lambs in their first year. This was the offering of Elizur son of Shedeur.

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).