'Self same' in the Bible

On this selfsame day, entered Noah, and Shem and Ham and Japheth. Noah's sons, - and Noah's wife, and his sons' three wives with them into the ark:

So Abraham took Ishmael his son and all born of his house and all bought with his silver - every male among the men of the house of Abraham, - and circumcised the flesh of their foreskin on this selfsame day, according to that which God had spoken with him.

On this selfsame day, was Abraham circumcised, - and Ishmael his son;