'Self same' in the Bible

And ye shall eat neither bread, nor parched grain, nor fresh ears, until this selfsame day, until ye have brought the oblation of your God. It is a statute forever throughout your generations in all your dwellings.

And ye shall make proclamation on the selfsame day, there shall be a holy convocation to you. Ye shall do no servile work. It is a statute forever in all your dwellings throughout your generations.