Abraham interceded with God, and God healed Abimelech and his wife…and they gave birth…And the LORD remembered Sarah as He had said…and Sarah bore a son…The Talmud understands as He had said as referring to the time Abraham asked God to heal Abimelech. In other words, after Abraham prayed for Abimelech to be blessed with a child, only then was he blessed with Isaac. This teaches us that helping others with what they need – especially when we need the same thing – only helps our cause.