Narrated `Abdullah bin `Umar: Once Allah's Apostle said, Amongst the trees there is a tree, the leaves of which do not fall and is like a Muslim, tell me the name of that tree. Everybody started thinking about the trees of the desert areas and I thought of the date-palm tree but felt shy (to answer). The others asked, O Allah's Apostle! inform us of it. He replied, it is the date-palm tree. I told my father what had come to my mind and on that he said, Had you said it I would have preferred it to such and such a thing that I might possess.