Genesis 21:5

And Abraham was an hundred years old, when his son Isaac was born unto him.
— Genesis 21:5, King James Version

In other translations

World English Bible (WEB)

Abraham was one hundred years old when his son, Isaac, was born to him.

American Standard Version (ASV)

And Abraham was a hundred years old, when his son Isaac was born unto him.

Young's Literal Translation (YLT)

And Abraham <FI>is<Fi> a son of a hundred years in Isaac his son being born to him,