Verse 6. -
Shall your brethren go to war, and shall ye sit here. Moses had good cause to feel great anxiety about the entry into Canaan proper. Once already the faith and courage of the people had failed them on the very threshold of the promised land, and a slight discouragement might bring about a similar calamity. Hence he spoke with a degree of sharpness which does not appear to have been deserved.
32:6-15 The proposal showed disregard to the land of Canaan, distrust of the Lord's promise, and unwillingness to encounter the difficulties and 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 sit down unconcerned about the difficult and perilous concerns of their brethren, whether public or personal. He reminds them of the fatal consequences of the unbelief and faint-heartedness of their fathers, when they were, as themselves, just ready to enter Canaan. If men considered as they ought what would be the end of sin, they would be afraid of the beginning of it.
And Moses said unto the children of Gad, and to the children of Reuben,.... 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.