John Gill's Bible Commentary Ver. 6. And Moses said unto the children of Gad, and to the children of Reuben , etc.] Being displeased with their motion, as his following discourse shows, it having at first sight an appearance of covetousness and cowardice: shall your brethren go to war, and shall ye sit here? it is not reasonable that your brethren should be left by you and engage in a war with your common enemies, to dispossess them of their land before they can settle in it and you remain here easy and quiet in the possession of a fruitful country.
Matthew Henry Commentary
Verses 6-15 - The proposal showed disregard to the land of Canaan, distrust of the Lord's promise, and unwillingness to encounter the difficulties an dangers of conquering and driving out the inhabitants of that land Moses is wroth with them. It will becomes any of God's Israel to sin down unconcerned about the difficult and perilous concerns of their brethren, whether public or personal. He reminds them of the fata consequences of the unbelief and faint-heartedness of their fathers when they were, as themselves, just ready to enter Canaan. If me considered as they ought what would be the end of sin, they would be afraid of the beginning of it.
Original Hebrew ויאמר559 משׁה4872 לבני1121 גד1410 ולבני1121 ראובן7205 האחיכם251 יבאו935 למלחמה4421 ואתם859 תשׁבו3427 פה׃6311