וְאַ֨בְרָהָ֔ם בֶּן־תִּשְׁעִ֥ים וָתֵ֖שַׁע שָׁנָ֑ה בְּהִמֹּל֖וֹ בְּשַׂ֥ר עָרְלָתֽוֹ׃
Era Abraham de edad de noventa y nueve años cuando circuncidó la carne de su prepucio.
The Midrash of Philo
Why does he say, Abraham was ninety and nine years old when he was circumcised, and Ishmael his son was thirteen years old? (Genesis 17:24).