Numbers 2:12-16

And those who camp next to him shall be the tribe of Simeon; and the leader of the sons of Simeon: Shelumiel the son of Zurishaddai,

and his army, their numbered men: 59,300.

Then follows the tribe of Gad; and the leader of the sons of Gad: Eliasaph the son of Deuel,

and his army, their numbered men: 45,650.

The total of the numbered men of the camp of Reuben: 151,450 by their armies. And they shall set out second.