Numbers 2:9, 16, 24

All the men assigned to the camp of Judah, according to their divisions, number 186,400. They will set out first.

All the men assigned to the camp of Reuben, according to their divisions, number 151,450. They will set out second.

All the men assigned to the camp of Ephraim, according to their divisions, number 108,100. They will set out third.