Numbers 32:8

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, and discouraged the people from going into it; the history of which Moses here gives:

when I sent them from Kadeshbarnea to see the land;
called only Kadesh, ( Numbers 13:26 ) the reason of the name (See Gill on Numbers 32:13).