GOD'S WORD® Translation
Abraham was 100 years old when his son Isaac was born.

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

Berean Study Bible
Abraham was a hundred years old when his son Isaac was born to him.

Douay-Rheims Bible
When he was a hundred years old: for at this age of his father was Isaac born.

English Revised Version
And Abraham was an hundred years old, when his son Isaac was born unto him.

King James Bible
And Abraham was an hundred years old, when his son Isaac was born unto him.

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

Young's Literal Translation
And Abraham is a son of a hundred years in Isaac his son being born to him,

Genesis 21:5 Additional Translations ...