Musnad Abu Ya'la al-Mawsili 109:311

Ibn Numayr narrated to us, Ishaq bin Mansur narrated to us, Isra'il narrated to us, from al-A'mash, from Abu Sufyan, from Jabir, who said: We were with the Messenger of Allah, may Allah bless him and grant him peace, on a military expedition, and a foul-smelling wind stirred up. The Prophet, may Allah bless him and grant him peace, said: "These are a people from the hypocrites who mentioned some people and backbited them."