Deuteronomy 19:7-9

Darby Translation

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

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

⁹ (if thou keep all this commandment to do it, which I command thee this day, to love Jehovah thy God, and to walk in his ways continually), then shalt thou add three cities more for thyself to these three,