Sahih al-Bukhari 2209
Narrated Ibn `Umar:
I was with the Prophet (ﷺ) while he was eating fresh dates. He said, "From the trees there is a tree which 
resembles a faithful believer." I wanted to say that it was the date palm, but I was the youngest among 
them (so I kept quiet). He added, "It is the date palm."
حَدَّثَنَا أَبُو الْوَلِيدِ، هِشَامُ بْنُ عَبْدِ الْمَلِكِ حَدَّثَنَا أَبُو عَوَانَةَ، عَنْ أَبِي بِشْرٍ، عَنْ مُجَاهِدٍ، عَنِ ابْنِ عُمَرَ ـ رضى الله عنهما ـ قَالَ كُنْتُ عِنْدَ النَّبِيِّ صلى الله عليه وسلم وَهْوَ يَأْكُلُ جُمَّارًا، فَقَالَ ‏"‏ مِنَ الشَّجَرِ شَجَرَةٌ كَالرَّجُلِ الْمُؤْمِنِ ‏"‏‏.‏ فَأَرَدْتُ أَنْ أَقُولَ هِيَ النَّخْلَةُ‏.‏ فَإِذَا أَنَا أَحْدَثُهُمْ قَالَ ‏"‏ هِيَ النَّخْلَةُ ‏"‏‏.‏