וְאַבְרָהָ֖ם בֶּן־מְאַ֣ת שָׁנָ֑ה בְּהִוָּ֣לֶד ל֔וֹ אֵ֖ת יִצְחָ֥ק בְּנֽוֹ׃
And Abraham was a hundred years old, when his son Isaac was born unto him.
Targum Jonathan on Genesis
And Abraham was the son of an hundred years when Izhak his son was born to him.