'Worm' in the Bible

Have no fear, you worm Jacob, and you men of Israel; I will be your helper, says the Lord, even he who takes up your cause, the Holy One of Israel.

See, the Lord God is my helper; who will give a decision against me? truly, all of them will become old like a robe; they will be food for the worm.

For like a coat they will be food for the insect, the worm will make a meal of them like wool: but my righteousness will be for ever, and my salvation to all generations.

And they will go out to see the dead bodies of the men who have done evil against me: for their worm will ever be living, and their fire will never be put out, and they will be a thing of fear to all flesh.