'Pieces Of Silver' in the Bible

Then said Joab to the man that was telling him, Lo! since thou sawest him, why didst thou not smite him there, to the ground? then should I have been bound to give thee ten pieces of silver, and a girdle.

And the man said unto Joab, Though I were weighing upon my palm a thousand pieces of silver, yet would I not put forth my hand against the son of the king, - for, in our hearing, the king Charged thee and Abishai and Ittai, saying, Watch any man who would touch the young man Absolom.