God will make you the head, not the tail; you’ll always be the top dog, never the underdog, as you obediently listen to and diligently keep the commands of God, your God, that I am commanding you today. (The Message Bible)
ESV - 13 And the Lord will make you the head and not the tail, and you shall only go up and not down, if you obey the commandments of the Lord your God, which I command you today, being careful to do them.
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