'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 for ever throughout your generations in all your dwellings.

And ye shall make proclamation on the selfsame day; there shall be a holy convocation unto you; ye shall do no servile work: it is a statute for ever in all your dwellings throughout your generations.