'Have Mercy' in the Bible

Nevertheless I will have mercy upon the house of Judah, and will save them even through the LORD their God. But I will not deliver them through any bow, sword, battle, horses, or horsemen."

I will sow them upon earth, for a seed to mine own self, and will have mercy upon her, that was without mercy. And to them which were not my people, I will say, 'Thou art my people.' And he shall say, 'Thou art my God.'"