Genesis 21:5

The Birth Of Isaac

⁴ Then Abraham circumcised his son Isaac when he was eight days old, as God had commanded him. ⁵ Now Abraham was one hundred years old when his son Isaac was born to him. ⁶ Sarah said, “God has made laughter for me; everyone who hears will laugh with me.”

Abraham

Isaac

Genesis 17:17

Then Abraham fell on his face and laughed, and said in his heart, “Will a child be born to a man one hundred years old? And will Sarah, who is ninety years old, bear a child?”

Genesis 17:1

Now when Abram was ninety-nine years old, the Lord appeared to Abram and said to him,
“I am God Almighty;
Walk before Me, and be blameless.

Romans 4:19

Without becoming weak in faith he contemplated his own body, now as good as dead since he was about a hundred years old, and the deadness of Sarah’s womb;