Deuteronomy 30:20
King James Version
“That thou mayest love the LORD thy God, that thou mayest obey his voice, and that thou mayest cleave unto him: for he thy life, and the length of thy days: that thou mayest dwell in the land which the LORD sware unto thy fathers, to Abraham, to Isaac, and to Jacob, to give them.”
Context
17But if thine heart turn away, so that thou wilt not hear, but shalt be drawn away, and worship other gods, and serve them;
18I denounce unto you this day, that ye shall surely perish, ye shall not prolong days upon the land, whither thou passest over Jordan to go to possess it.
19I call heaven and earth to record this day against you, I have set before you life and death, blessing and cursing: therefore choose life, that both thou and thy seed may live:
20That thou mayest love the LORD thy God, that thou mayest obey his voice, and that thou mayest cleave unto him: for he thy life, and the length of thy days: that thou mayest dwell in the land which the LORD sware unto thy fathers, to Abraham, to Isaac, and to Jacob, to give them.