Deuteronomy 19:7-9

King James Version

⁷ Wherefore I command thee, saying, Thou shalt separate three cities for thee.

⁸ And if the Lord thy God enlarge thy coast, as he hath sworn unto thy fathers, and give thee all the land which he promised to give unto thy fathers;

⁹ If thou shalt keep all these commandments to do them, which I command thee this day, to love the Lord thy God, and to walk ever in his ways; then shalt thou add three cities more for thee, beside these three: