Numbers 32:5-9

And they said, “If we have found favor in your sight, let this land be given to your servants as our property; do not take us across the Jordan.”

But Moses said to the sons of Gad and the sons of Reuben, “Should your brothers go to war while you remain here?

And why are you discouraging the sons of Israel from crossing over into the land which the Lord has given them?

This is what your fathers did when I sent them from Kadesh-barnea to see the land.

For when they went up to the Valley of Eshcol and saw the land, they discouraged the sons of Israel so that they did not go into the land which the Lord had given them.