جامع الترمذي

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.'"