Genesis 49:17

A Conservative Version

Dan shall be a serpent in the way, an adder in the path, that bites the horse's heels, so that his rider falls backward.

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And of the Danites who could set the battle in array, twenty-eight thousand and six hundred.

Dan shall judge his people, as one of the tribes of Israel.

I have waited for thy salvation, O LORD.

At the end it bites like a serpent, and stings like an adder.

If the serpent bites before it is charmed, then is there no advantage in the charmer.