Musnad Ahmad 30:2781

Muhammad ibn Ja‘far narrated to us, he said: Shu‘bah narrated to us, from Yazid ibn Khumayr, he said: A freed slave of Quraysh informed me that he heard Abu Hurayrah narrating from the Prophet, may Allah bless him and grant him peace: "That he forbade the selling of war spoils until they are divided—then Yazid ibn Khumayr said afterwards: 'And he knows what they are,' Yazid said it the last time—and [he forbade] the selling of fruit until it is secured from every blight, and that a man should not pray unless he is girded."