He said, “Good! I will make a covenant with you, but I demand one thing of you, namely, you shall not see my face unless you first bring Michal, Saul’s daughter, when you come to see me.”

David sent messengers to Ish-bosheth son of Saul with this demand: "Give me my wife Michal whom I acquired for a hundred Philistine foreskins."

how much more, when wicked men have slain a righteous person in his own house upon his bed? and should I not now demand his blood of your hand, and take you away from the earth?