What king of gerar took Sarah away from Abraham?

Abimelech king of gerar took Sarah away from Abraham. Abimelech thought that Sarah was the sister of Abraham. Abimelech had a dream that night saying that Sarah was the wife of Abraham and that if he didnt riturn her back to her husband Abimelech was going to die. At the end Abimelech king of gerar took back Sarah to Abraham.

my name is abimelech

i am the king