Musnad Ahmad 30:3852

Mu'ammal ibn Isma'il narrated to us, Hammad—meaning Ibn Salamah—narrated to us, Hisham and Habib ibn al-Shahid narrated to us, from Ibn Sirin, from Abu Hurairah, that the Prophet, peace and blessings of Allah be upon him, said: "Faith is Yemeni, jurisprudence is Yemeni, and wisdom is Yemeni."