'Self same' in the Bible

In the selfsame day Noah, and Shem, and Ham, and Japheth, the sons of Noah, and Noah's wife, and the three wives of his sons with them, entered into the ark,

And Abraham took Ishmael his son, and all who were born in his house, and all who were bought with his money, every male among the men of Abraham's house, and circumcised the flesh of their foreskin in the selfsame day, as God had

In the selfsame day Abraham was circumcised, and Ishmael his son.