2 Samuel 14:2

² And Joab sent to Tekoah, and brought thence a wise woman, and said to her, I pray thee, feign thyself to be a mourner, and put on now mourning apparel, and anoint not thyself with oil, but be as a woman that had a long time mourned for the dead:

Wine, oil, flour, and wheat

In Revelation 18:13, 'wine, oil, flour, and wheat' signify celestial principles of worship.