Narrated Ibn 'Umar:
that the Messenger of Allah (ﷺ) said: Indeed there is a tree that does not shed its foilage, and it is is similar to the believer. Can any of you tell me what it is? 'Abdullah said: The people started thinking about the trees of the desert. And it occurred to me that it may be the date-palm. Then the Prophet (ﷺ) said: It is the date-palm. But I was shy - meaning to say anything. 'Abdullah said: So I informed 'Umar about what I had thought of, and he said: 'If you had said it, that would be more beloved to me than this or that.'