What does Genesis 26:9 mean?
When confronted by Abimelech about his lie that Rebekah was his sister, Isaac tells the truth about his fear: he didn't want to die because of his wife. As was the case when Abraham did the same thing (Genesis 12:11–13), it's hard to feel respect for a man who would do such a thing to his spouse. Even the pagan king is angered at this deception, even though nobody has suffered for it, yet. This might be a lingering lesson from the earlier incident with Abraham, where a prior king, also called Abimelech (Genesis 20:2), was faced with consequences when he nearly violated Sarah's marriage to Abraham (Genesis 20:3–6). Despite his fear and faithlessness, God will provide protection for Isaac, no matter how untrusting he appears to be.Genesis 26:6–35 describes Isaac's interactions with the Philistines while living in and around the land of Gerar. After Isaac is caught in a lie about Rebekah being his sister, king Abimelech is angry. However, he protects Isaac and Rebekah. God blesses Isaac abundantly, and his wealth grows to the point where his power provokes the king to send him away. Following a series of disputes over water rights, the king and Isaac eventually make a treaty of peace. God appears to Isaac for a second time, telling him not to fear, and renewing His promises.
Genesis 26 focuses on God's assurances to Isaac to be with him and to bless him, mostly while Isaac and his household are settled in the land of the Philistines. Just as Abraham did, Isaac fearfully lies about his wife being his sister, nearly bringing disaster on Abimelech and his kingdom. Still, God blesses Isaac with greater and greater abundance to the point that Abimelech sends Isaac away because he has become too powerful. After continued disputes over water rights, Abimelech and Isaac eventually make a covenant of peace.