'Precious' in the Bible

And again he sent the captain of a third fifty with his fifty. And the third captain of fifty went up, and came and fell on his knees before Elijah, and besought him, and said unto him, O man of God, I pray thee, let my life, and the life of these fifty thy servants, be precious in thy sight.

Behold, there came fire down from heaven, and consumed the two former captains of fifty with their fifties; but now let my life be precious in thy sight.

And Hezekiah hearkened unto 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 showed them not.