Verse 9. For this is the word of promise. This is the promise made to Abraham. The design of the apostle, in introducing this, is doubtless to show to whom the promise appertained; and by specifying this, he shows that it had not reference to Ishmael, but to Isaac.

At this time. Greek, According to this time. See Ge 8:10,14. Probably it means at the exact time promised; I will fulfil the prediction at the very time. Comp.2 Ki 4:16.

{l} "At this time" Ge 18:10,14