Bible Verses About Adder: A venomous serpent.

Let Dan be a snake in the way, a serpent in the path, that biteth the horse's heels, that his rider may fall backward.

For behold they have caught my soul: the mighty have rushed in upon me:

The just shall flourish like the palm tree: he shall grow up like the cedar of Libanus.

Set a watch, O Lord, before my mouth: and a door round about my lips.

But in the end, it will bite like a snake, and will spread abroad poison like a basilisk.