Numbers 2:14
Ver. 14. Then the tribe of Gad,.... Who was placed on the other side of Reuben's standard, and according to the former direction he must be before, and Simeon behind; and Gad being the eldest son of Leah's handmaid Zilpah, is fitly placed under Leah's firstborn, and being the son of an handmaid, could not object to his situation:
and the captain of the sons of Gad [shall be] Eliasaph the son of Reuel: who is called Deuel, Nu 1:14. The letters r, "resh", and d, "daleth", being similar, are sometimes put one for the other, of which there are other instances, as in Ge 10:3, compared with 1Ch 1:6.