So Abraham prayed unto God: and God healed Abimelech, and his wife, and his maidservants; and they bare children. So Abraham prayed - This was the prime office of the נביא nabi; see Genesis 20:7.
Related Commentaries of Genesis 20:17
Genesis 20:17
17 So Abraham prayed unto God: and God healed Abimelech, and his wife, and his maidservants; and they bare children.