The Bible

Daniel 9:3

³ And I set my face unto the Lord God, to seek by prayer and supplications, with fasting, and sackcloth, and ashes;

Commentary

Works, emeralds, purple broidered work, fine linen, coral, and agate

In Ezekiel 27:16, coral signifies knowledge of good. (Arcana Coelestia 1232)

Works, emeralds, purple broidered work, fine linen, coral, and agate, (Ezekiel 27:16), signify knowledges of good.