What does Genesis 21:26 mean?
Abimelech, the king of Gerar, has approached Abraham with a proposal. The king wishes to create a formal agreement with Abraham, seemingly in order to gain some benefit from Abraham's blessings from God. After agreeing to swear before God not to deceive Abimelech again and only to deal kindly with him, Abraham immediately presented a grievance: A well that Abraham had dug and rightly felt belonged to him had been seized by Abimelech's men.Here, Abimelech insists he didn't know anything about this issue. He didn't even know which men had seized the well. This was all new information to him. This is similar to his claims that he was unaware of Sarah's marriage to Abraham in chapter 20. We're not told how or if Abimelech offered to resolve the issue, though the men continue with their covenant, so Abimelech clearly planned to return the well to Abraham and his men. Abraham will specifically include this well in the oath, described in the following verses.