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sn I will be with you and I will bless you. The promise of divine presence is a promise to intervene to protect and to bless.
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sn To you and to your descendants. The Abrahamic blessing will pass to Isaac. Everything included in that blessing will now belong to the son, and in turn will be passed on to his sons. But there is a contingency involved: If they are to enjoy the full blessings, they will have to obey the word of the Lord. And so obedience is enjoined here with the example of how well Abraham obeyed.
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sn The solemn promise I made. See Gen 15:18-20; 22:16-18.
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sn The Hebrew word מְצַחֵק (m˙tsakheq), from the root צָחַק (tsakhaq, “laugh”), forms a sound play with the name “Isaac” right before it. Here it depicts an action, probably caressing or fondling, that indicated immediately that Rebekah was Isaac’s wife, not his sister. Isaac’s deception made a mockery of God’s covenantal promise. Ignoring God’s promise to protect and bless him, Isaac lied to protect himself and acted in bad faith to the men of Gerar.
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sn This valley was actually a wadi (a dry river bed where the water would flow in the rainy season, but this would have been rare in the Negev). The water table under it would have been higher than in the desert because of water soaking in during the torrents, making it easier to find water when digging wells. However, this does not minimize the blessing of the Lord, for the men of the region knew this too, but did not have the same results.
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