Deuteronomy Chapter 7, Verse 12

12: Wherefore it shall come to pass, if ye hearken to these judgments, and keep, and do them, that the LORD thy God shall keep unto thee the covenant and the mercy which he sware unto thy fathers:- edit KJV text
12: If after thou hast heard these judgments, thou keep and do them, the Lord thy God will also keep his covenant to thee, and the mercy which he swore to thy fathers:— edit Douay text
12: And it shall come to pass when ye shall have heard these ordinances, and shall have kept and done them, that the Lord thy God shall keep for thee the covenant and the mercy, which he sware to your fathers.— edit LXX text