Numbers 1:5 - And these are the names of the men that shall stand with you: of the tribe of Reuben; Elizur the son of Shedeur. (Verses like Numbers 1:5)
Numbers 2:10 - On the south side shall be the standard of the camp of Reuben according to their armies: and the captain of the children of Reuben shall be Elizur the son of Shedeur. (Verses like Numbers 2:10)