The Prophet ﷺ 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. The others then asked, "Please inform us what is that tree, O Messenger of Allah ﷺ?" He replied, "It is the date-palm tree."  

عَنِ النَّبِيِّ ﷺ قَالَ إِنَّ مِنَ الشَّجَرِ شَجَرَةً لاَ يَسْقُطُ وَرَقُهَا وَإِنَّهَا مَثَلُ الْمُسْلِمِ حَدِّثُونِي مَا هِيَ قَالَ فَوَقَعَ النَّاسُ فِي شَجَرِ الْبَوَادِي قَالَ عَبْدُ اللَّهِ فَوَقَعَ فِي نَفْسِي أَنَّهَا النَّخْلَةُ ثُمَّ قَالُوا حَدِّثْنَا مَا هِيَ يَا رَسُولَ اللَّهِ قَالَ هِيَ النَّخْلَةُ