Zuhayr ibn Harb narrated to us, Ali ibn Hafs narrated to us, Warqa' narrated to us, from Abu al-Zinad, from al-A'raj, from Abu Hurayrah, who said: The Messenger of Allah, peace and blessings be upon him, said: "Let none of you call [the grapevine] al-karm (the noble one), for indeed al-karm (the noble one) is the heart of the believer."