Deuteronomy 6:10-15

And when the Lord thy God shall have brought thee into the land, for which he swore to thy fathers Abraham, Isaac, and Jacob: and shall have given thee great and goodly cities, which thou didst not build, Houses full of riches, which thou didst not set up, cisterns which thou didst not dig, vineyards and oliveyards, which thou didst not plant: And thou shalt have eaten and be full: Take heed diligently lest thou forget the Lord, who brought thee out of the land of Egypt, out of the house of bondage. Thou shalt fear the Lord thy God, and shalt serve him only: and thou shalt swear by his name. You shall not go after the strange gods of all the nations, that are round about you: Because the Lord thy God is a jealous God in the midst of thee: lest at any time the wrath of the Lord thy God be kindled against thee, and take thee away from the face of the earth.