Genesis 17:26

17:26 Abraham and his son Ishmael were circumcised on the very same day.

Genesis 7:13

7:13 On that very day Noah entered the ark, accompanied by his sons Shem, Ham, and Japheth, along with his wife and his sons’ three wives. ¹ 

Genesis 17:23

17:23 Abraham took his son Ishmael and every male in his household (whether born in his house or bought with money) ²  and circumcised them ³  on that very same day, just as God had told him to do.

[7:13]  ¹ tn Heb “On that very day Noah entered, and Shem and Ham and Japheth, the sons of Noah, and the wife of Noah, and the three wives of his sons with him into the ark.”

[17:23]  ¹ tn Heb “Ishmael his son and all born in his house and all bought with money, every male among the men of the house of Abraham.”

[17:23]  ² tn Heb “circumcised the flesh of their foreskin.” The Hebrew expression is somewhat pleonastic and has been simplified in the translation.