a17:17-18
b17:19
c21:6
d17:20-21
e25:13-16

‏ Genesis 17:16-20

Summary for Gen 17:17-18: 17:17-18  a Abraham laughed (Hebrew yitskhaq) because the promise seemed unbelievable; he had begun to believe that his line would come through Ishmael. But Abraham and Sarah would have a son of their own.
17:19  b The name Isaac (Hebrew yitskhaq, “he laughs”) would constantly recall Abraham’s disbelieving laughter when he heard the promise. It was also a reminder of God’s favor and his pleasure in the birth (cp. 21:6  c).
Summary for Gen 17:20-21: 17:20-21  d Ishmael would not be abandoned; his family would prosper (see 25:13-16  e), but the covenant promises were for Isaac.
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