Jamieson-Fausset-Brown on Numbers 32:20
Moses said unto them, If ye will do this thing--with sincerity and zeal.
go before the Lord to war--The phrase was used in allusion to the order of march in which the tribes of Reuben and Gad immediately preceded the ark (see on Num. 2:10-31), or to the passage over the Jordan, in which the ark stood in mid-channel, while all the tribes marched by in succession (Jos 3:4), of course including those of Reuben and Gad, so that, literally, they passed over before the Lord and before the rest of Israel (Jos 4:13). Perhaps, however, the phrase is used merely in a general sense to denote their marching on an expedition, the purpose of which was blessed with the presence, and destined to promote t…
Read the whole note in the consoleJohn Gill on Numbers 32:20
And Moses said unto them,.... Being better disposed towards them, and more satisfied with the reasonableness of their request, it being explained unto him:
if ye will do this thing; which they had promised:
if ye will go armed before the Lord to war; they had said they would go ready armed before the children of Israel, but Moses expresses it "before the Lord"; which is more agreeable to their encampment and order in marching, for not the standard of Reuben but that of Judah went foremost, yet the standard of Reuben marched directly before the sanctuary bore by the Kohathites, Numbers 10:18, and so might be properly said to go before the Lord, who dwelt there.
John Calvin on Numbers 32:20-22
And Moses said unto them. Moses might seem to err on the side of excessive good-nature, in that he extends the boundaries prescribed by God, in complying with their wish. For, since their inheritance had been promised them in the land of Canaan, they ought to have been contented with that as their abode; nor was it allowable for Moses to make any alteration in the Divine decree. There is also another thing no less inconsistent, that in a point of so much perplexity, Moses does not, as usual, consult God, but gives an immediate answer, which indirectly overthrows the previous ordinance of God. And, in truth, their desire was by no means excusable, since it would have never entered their minds…
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