'Have Mercy' in the Bible

Then the agent of LORD answered and said, O LORD of hosts, how long will thou not have mercy on Jerusalem and on the cities of Judah, against which thou have had indignation these seventy 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 LORD their God, and I will hear th