'Precious' in the Bible

Then Saul said, "I have sinned! Come back, David my son, for I will not harm you again, because my life [was] precious in your eyes this day. Look, I have acted like a fool and {have made a terrible mistake}."

Look, as your life was precious in my eyes this day, may my life be great in the eyes of Yahweh, and may he rescue me from all trouble."