Narrated Ibn `Umar: The Prophet said, The example of a believer is like a green tree, the leaves of which do not fall. The people said. It is such-and-such tree: It is such-and-such tree. I intended to say that it was the datepalm tree, but I was a young boy and felt shy (to answer). The Prophet said, It is the date-palm tree. Ibn `Umar added, I told that to `Umar who said, 'Had you said it, I would have preferred it to such-and such a thing.