Deuteronomy 27:9

Revised Standard Version (RSV-CI)

And Moses and the Levitical priests said to all Israel, “Keep silence and hear, O Israel: this day you have become the people of the Lord your God.

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But now that you have been set free from sin and have become slaves of God, the return you get is sanctification and its end, eternal life.

And you shall write upon the stones all the words of this law very plainly.”

You shall therefore obey the voice of the Lord your God, keeping his commandments and his statutes, which I command you this day.”

And thou didst establish for thyself thy people Israel to be thy people for ever; and thou, O Lord, didst become their God.