Hebrews 11:11, 12, 19
Hebrews 11:11 NIV
And by faith even Sarah, who was past childbearing age, was enabled to bear children because she considered him faithful who had made the promise.
Hebrews 11:12 NIV
And so from this one man, and he as good as dead, came descendants as numerous as the stars in the sky and as countless as the sand on the seashore.
Hebrews 11:19 NIV
Abraham reasoned that God could even raise the dead, and so in a manner of speaking he did receive Isaac back from death.