Strongs Number: G440
Orig: of uncertain derivation; a live coal:--coal of fire.
Heb Strong: H100 H916 H1513 H3956 H5306 H6352 H7531 H7565 H8658
1) a burning or live coal
A proverbial expression signifying to call up, by favours you confer on your enemy, the memory in him of the wrong he has done you (which shall pain him as if live coals were heaped on his head), that he may the more readily repent. The Arabians call things that cause very acute mental pain "burning coals of the heart" and "fire of the liver".