en_tn/gen/21/25.md

Abraham complained to Abimelech concerning a well of water that Abimelech’s servants had seized from him.

This can be translated as "Abraham rebuked Abimelech because Abimelech's servants had taken one of Abraham's wells."

seized from him

"taken from Abraham" or "had taken control of" (UDB)

I have not heard of it until today

This can be translated as "and I did not hear about it until today" or "This is the first time I have heard about it."