Deuteronomy 31:24-26

LXX2012(i) 24 And when Moses finished writing all the words of this law in a book, even to the end, 25 then he charged the Levites who bear the ark of the covenant of the Lord, saying, 26 Take the book of this law, and you⌃ shall put it in the side of the ark of the covenant of the Lord your God; and it shall be there among you for a testimony.