NET

20 I also call on you to love the Lord your God, to obey him and be loyal to him, for he gives you life and enables you to live continually in the land the Lord promised to give to your ancestors Abraham, Isaac, and Jacob.”

Darby

20 in loving Jehovah thy God, in hearkening to his voice, and in cleaving to him for this is thy life and the length of thy days that thou mayest dwell in the land which Jehovah swore unto thy fathers, to Abraham, to Isaac, and to Jacob, to give them.

KJV

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.