Deuteronomy 7:9-11

Revised Standard Version

⁹ Know therefore that the Lord your God is God, the faithful God who keeps covenant and steadfast love with those who love him and keep his commandments, to a thousand generations, ¹⁰ and requites to their face those who hate him, by destroying them; he will not be slack with him who hates him, he will requite him to his face. ¹¹ You shall therefore be careful to do the commandment, and the statutes, and the ordinances, which I command you this day.