What does Genesis 26:11 mean?
Isaac's plan to protect himself from harm if someone wanted to take his beautiful wife (Genesis 26:5–9) is shown to have put more than just Rebekah at risk. When Abimelech, the king of the region, becomes aware of the lie, he is justifiably angry. In fact, Abimelech expresses at least a sliver of godly morality, when he stated that the lie could have brought guilt upon him and his kingdom if someone had taken her (Genesis 26:10).Now, though, Abimelech acts to make sure that such a thing does not happen. If anyone dares to harm either Isaac or Rebekah in any way, he will enact the death penalty.
Through Abimelech's actions, God has shown once again that He is with Isaac and protecting him, even and in spite of Isaac's apparently fearful and faithless actions. This seems to be a part of God teaching the same lesson learned by Abraham—that His love and blessings are personal, and apply to Isaac himself (Genesis 26:1–5).