Matthew Poole and continuators on Numbers 32:20

20 And Moses said unto them, If ye will do this thing, if ye will go armed before the LORD to war,

Either 1. sincerely and heartily, as in Gods presence. Or rather 2. before the Ark. which was the token of Gods presence. He alludes either to the order of the tribes in their march, whereby Reuben and Gad marched next and immediately before the ark, as appears from Numb. 2. 10, 14, 16, 17. Or to the manner of their passage over Iordan▪ wherein the Ark went first into Iordan and stood there whilest all the tribes marched over Iordan by and before it, Ios. 3. and 4. and these amongst the rest, as is expresly noted in these very words, that they passed over before the Lord, Ios. 4. 13.

Marginal references: Josh. 1. 13.