Why will you discourage the heart of the people of Israel from going over into the land that the LORD has given them?
Thus did your fathers,.... Meaning not particularly and only the fathers of these two tribes he was speaking to, but of them and the other tribes also, who acted much such a part; did not choose to go into the good land to possess it, when they were bid to do it, but were for sending spies first, which brought an ill report of it...
Num 32:6-13 Moses first of all blames their want of brotherly feeling: “Shall your brethren go into the war, and ye sit here?” He then calls their attention to the fact, that by their disinclination they would take away the courage and inclination of the other tribes to cross over the Jordan and conquer the land, and would bring the wrath of God upon Israel...
Commenting on Numbers 32:6-13