'Coal' in the Bible

And, behold, the whole family is risen against thy handmaid, and they say, Deliver him that smote his brother, that we may kill him for the life of his brother whom he slew, and so destroy the heir also. Thus will they quench my coal which is left, and will leave to my husband neither name nor remainder upon the face of the earth.

Then flew one of the seraphim unto me, having a live coal in his hand, which he had taken with the tongs from off the altar:

Behold, they shall be as stubble; the fire shall burn them; they shall not deliver themselves from the power of the flame: it shall not be a coal to warm at, nor a fire to sit before.

Their visage is blacker than a coal; they are not known in the streets: Their skin cleaveth to their bones; it is withered, it is become like a stick.