Gen_21:2 For Sarah conceived, and bare Abraham a son in his old age, at the set time of which God had spoken to him.
Ver. 2. For Sarah conceived.] By the force of her faith, though at first she faltered. {Heb_11:11}
And bare Abraham a son in his old age.] Beatae senectutis et emeritae fidei filium , as one well calleth Isaac. {a} St Paul, for this, saith he was "born after the Spirit". {Gal_4:29}