Musnad Ahmad 962:31

Waki’ narrated to us, Ali bin Salih narrated to us, from Abu al-Muhallab, from Ubaydullah bin Zahr, from Ali bin Yazid, from al-Qasim, from Abu Umamah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, the most enviable of my allies in my sight is a believer who is light of burden, possessing a share of prayer, who worships his Lord well, and who is obscure among the people, not being pointed at with fingers. His death comes quickly, his inheritance is little, and his mourners are few."