Musannaf Ibn Abi Shayba 13:3245

Abu Bakr narrated to us, he said: Yazid ibn Harun and Zayd ibn al-Hubab narrated to us, from Musa ibn Ali, he said: I asked al-Zuhri about a vessel of the enemy that the wind cast toward a people. He said: It belongs to the one who seized it, and in it is the khums (one-fifth).