Commentaries:
Adam Clarke
My covenant will I establish with Isaac - All temporal good things are promised to Ishmael and his posterity, but the establishment of the Lord' s covenant is to be with Isaac. Hence it is fully evident that this covenant referred chiefly to spiritual things - to the Messiah, and the salvation which should be brought to both Jews and Gentiles by his incarnation, death, and glorification.
Other Adam Clarke entries containing Genesis 17:21:
Genesis 17:22
Exodus 12:40
Galatians 4:29
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