Deuteronomy 17:16

13 and all the people do hear and fear, and do not presume any more.

14 `When thou comest in unto the land which Jehovah thy God is giving to thee, and hast possessed it, and dwelt in it, and thou hast said, Let me set over me a king like all the nations which [are] round about me, --

15 thou dost certainly set over thee a king on whom Jehovah doth fix; from the midst of thy brethren thou dost set over thee a king; thou art not able to set over thee a stranger, who is not thy brother.

16 `Only, he doth not multiply to himself horses, nor cause the people to turn back to Egypt, so as to multiply horses, seeing Jehovah hath said to you, Ye do not add to turn back in this way any more.

17 And he doth not multiply to himself wives, and his heart doth not turn aside, and silver and gold he doth not multiply to himself -- exceedingly.

18 `And it hath been, when he sitteth on the throne of his kingdom, that he hath written for himself the copy of this law, on a book, from [that] before the priests the Levites,

19 and it hath been with him, and he hath read in it all days of his life, so that he doth learn to fear Jehovah his God, to keep all the words of this law, and these statutes, to do them;