'Have Mercy' in the Bible

And there came out of those quarters a Canaanitish woman, and cried to Him saying, Have mercy on me, O Lord, thou son of David; for my daughter is grievously tormented by a demon.

and behold, two blind men siting by the way-side, when they heard that Jesus was passing by, cried out, saying, Have mercy on us, O Lord, thou son of David.

And the people rebuked them, that they might hold their peace: but they cried out the more, saying, Have mercy on us, O Lord, thou son of David.