'Precious' in the Bible

Again he sent the captain of a third fifty with his fifty. The third captain of fifty went up, and came and fell on his knees before Elijah, and begged him, and said to him, "Man of God, please let my life, and the life of these fifty your servants, be precious in your sight.

Behold, fire came down from the sky, and consumed the two former captains of fifty with their fifties. But now let my life be precious in your sight."

Hezekiah listened to them, and showed them all the house of his precious things, the silver, and the gold, and the spices, and the precious oil, and the house of his armor, and all that was found in his treasures: there was nothing in his house, nor in all his dominion, that Hezekiah didn't show them.