Deuteronomy 19:8-10

8And if Jehovah thy 1God 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 2God, and to walk in his ways continually), then shalt thou add three cities more for thyself to these three,

10that innocent blood be not shed in the midst of thy land which Jehovah thy 3God giveth thee for an inheritance, and blood come not upon thee.