'Tail' in the Bible

The Lord will make you the head (leader) and not the tail (follower); and you will be above only, and you will not be beneath, if you listen and pay attention to the commandments of the Lord your God, which I am commanding you today, to observe them carefully.

He will lend to you [out of his affluence], but you will not lend to him [because of your poverty]; he will be the head, and you the tail.