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.

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) and circumcised them on that very same day, just as God had told him to do.