Numbers 2:9

2:9 All those numbered of the camp of Judah, according to their divisions, are 186,400. They will travel ¹  at the front.

Numbers 2:16

2:16 All those numbered of the camp of Reuben, according to their divisions, are 151,450. They will travel second.

Numbers 2:31

2:31 All those numbered of the camp of Dan are 157,600. They will travel last, under their standards.”

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¹ tn The verb is נָסָע (nasa’): “to journey, travel, set out,” and here, “to move camp.” Judah will go first, or, literally, at the head of the nation, when they begin to travel.