Musnad Ahmad 30:3098

Waki’ narrated to us, he said: Sufyan narrated to us, from Abu al-Zinad, from al-A’raj, from Abu Hurayrah, who said: "The Messenger of Allah, may Allah bless him and grant him peace, forbade the sale of *al-munabadhah* (the casting sale) and *al-mulamasah* (the touching sale)."