John Gill Commentary Numbers 32:5

"And they said, If we have found favor in thy sight, let this land be given unto thy servants for a possession; bring us not over the Jordan." — Numbers 32:5 (ASV)

Wherefore, said they, if we have found grace in your sight
Directing their speech to Moses, the ruler of the congregation, in a very modest, decent, and respectable manner:

let this land be given to your servants for a possession ;
as their own portion and inheritance, to be enjoyed by them, and their children after them:

and bring us not over Jordan ;
into the land of Canaan, where as they later explain themselves, they did not desire to have any part with their brethren, but should be content with their possession here, if it were granted to them.