'Have Mercy' in the Bible

Is Ephraim my dear son? is he the child of my delight? for whenever I say things against him, I still keep him in my memory: so my heart is troubled for him; I will certainly have mercy on him, says the Lord.

You have mercy on thousands, and send punishment for the evil-doing of the fathers on their children after them: the great, the strong God, the Lord of armies is his name:

Then I will give up caring for the seed of Jacob and of David my servant, so that I will not take of his seed to be rulers over the seed of Abraham, Isaac, and Jacob: for I will let their fate be changed and will have mercy on them.

And I will have mercy on you, so that he may have mercy on you and let you go back to your land.