Proverbs 3:15; Proverbs 8:11; Proverbs 20:15

15 She is more precious than rubies: and all the things thou canst desire are not to be compared unto her.

11 For wisdom is better than rubies; and all the things that may be desired are not to be compared to it.

15 There is gold, and a multitude of rubies: but the lips of knowledge are a precious jewel.