'Have Mercy' in the Bible

Then the angel of Jehovah answered and said, O Jehovah of hosts, how long wilt thou not have mercy on Jerusalem and on the cities of Judah, against which thou hast had indignation these threescore and ten years?

And I will strengthen the house of Judah, and I will save the house of Joseph, and I will bring them back; for I have mercy upon them; and they shall be as though I had not cast them off: for I am Jehovah their God, and I will hear them.