'Self same' in the Bible

Son of man, write thee the name of the day, [even] of this selfsame day; the king of Babylon drew close to Jerusalem this selfsame day.

In the twenty-fifth year of our captivity, in the beginning of the year, in the tenth [day] of the month, in the fourteenth year after the city was smitten, in the selfsame day, the hand of LORD was upon me, and he brought me there