Abimelech is an oratorio in three acts written by Christopher Smart and put to music by Samuel Arnold. It was first performed in the Haymarket Theatre in 1768. A heavily revised version of the oratorio ran at Covent Garden in 1772. Abimelech was the second of two oratorio librettos written by Smart, the first being Hannah written in 1764. Just like Hannah, Abimelech ran for only one night, each time. It was to be Smart's last work dedicated to an adult audience.
Abimelech retells the biblical story of Abraham and Sarah when they met the King of Gerar, Abimelech, and he tries to take Sarah as his wife. After God intervenes in a dream, Sarah, who was previously barren, is restored to Abraham and made fertile. The oratorio emphasizes the sexual jealousy and the sexual fidelity of spouses.