Jewish Publication Society of America Version (JPS1917) - Deuteronomy 30:20 >

to love the LORD thy God, to hearken to His voice, and to cleave unto Him; for that is thy life, and the length of thy days; that thou mayest dwell in the land which the LORD swore unto thy fathers, to Abraham, to Isaac, and to Jacob, to give them.

King James Version (KJV) - Deuteronomy 30:20 >

That thou mayest love the LORD thy God, [and] that thou mayest obey his voice, and that thou mayest cleave unto him: for he [is] 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.

Berean Study Bible (BSB) - Deuteronomy 30:20 >

and that you may love the LORD your God, obey Him, and hold fast to Him. For He is your life, and He will prolong your life in the land that the LORD swore to give to your fathers, to Abraham, Isaac, and Jacob.”