Deuteronomy 17:18-20

LXX2012(i) 18 And when he shall be established in his government, then shall he write for himself this repetition of the law into a book by the hands of the priests the Levites; 19 and it shall be with him, and he shall read in it all the days of his life, that he may learn to fear the Lord your God, and to keep all these commandments, and to observe these ordinances: 20 that his heart be not lifted up above his brethren, that he depart not from the commandments on the right hand or on the left; that he and his sons may reign long in his dominion among the children of Israel.