Genesis 21:5

5 When he was a hundred years old: for at this age of his father, was Isaac born.

Genesis 21:5 Meaning and Commentary

Genesis 21:5

And Abraham was an hundred years old when son Isaac was born
unto him.
] So that this was years after his departure from Haran, and coming into the land of Canaan, for then he was seventy five years of age, ( Genesis 12:4 ) ; and this exactly agrees with the account of Demetrius, as related by Polyhistor, an Heathen writer ^F15, who makes Isaac to be born just twenty five years from Abraham's coming into the land of Canaan, and who must be now an hundred years old, being ninety nine at the time the Lord appeared unto him, and promised him a son at the set time the next year, ( Genesis 17:1 Genesis 17:21 ) . This is observed, both to show the wonderful favour to Abraham, and the faithfulness of God in the exact performance of his promise: according to Bishop Usher ^F16, Isaac was born A. M. 2108, and before Christ 1896, and probably at Beersheba, see ( Genesis 21:33 Genesis 21:34 ) .

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FOOTNOTES:

F15 Apud Euseb. Praepar. Evangel. l. 9. c. 21. p. 425.
F16 Annales Vet. Test. p. 9.

Genesis 21:5 In-Context

3 And Abraham called the name of his son, whom Sara bore him, Isaac.

4 And he circumcised him the eighth day, as God had commanded him,

5 When he was a hundred years old: for at this age of his father, was Isaac born.

6 And Sara said: God hath made a laughter for me: whosoever shall hear of it will laugh with me.

7 And again she said: Who would believe that Abraham should hear that Sara gave suck to a son, whom she bore to him in his old age?