Musnad Abu Ya'la al-Mawsili 3:210

Nasr ibn Ali narrated to us, al-Abbas ibn Ja'far ibn Zayd ibn Talq al-Shanni al-'Abdi informed me, from his father, from his grandfather, from Ali, who said: When I married Fatimah, I said, "O Messenger of Allah, shall I sell my horse or my armor?" He said, "Sell your armor." So I sold it for twelve ounces, and that was the dowry of Fatimah.