Sahih Muslim 2811 e
Ibn Umar reported:
We were'in the company of Allah's Messenger (ﷺ) that he said: Tell me of a tree which has resemblance to a Muslim and the leaves of which do not wither. Ibrahim said that perhaps Imam Muslim had stated like this: It constantly bears fruit but I have, however, seen [It does not bear fruit constantly]. Ibn Umar said: It crossed my mind that it could be the date-palm tree, but as I saw Aba Bakr and Umar observe silence, I did not deem it fit that I should speak or I should say something. 'Umar said: Had you said so, it would have been dearer to me than such and such thing.
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا أَبُو أُسَامَةَ، حَدَّثَنَا عُبَيْدُ اللَّهِ بْنُ عُمَرَ، عَنْ 
 نَافِعٍ، عَنِ ابْنِ عُمَرَ، قَالَ كُنَّا عِنْدَ رَسُولِ اللَّهِ صلى الله عليه وسلم فَقَالَ ‏
"‏ أَخْبِرُونِي بِشَجَرَةٍ
 شِبْهِ أَوْ كَالرَّجُلِ الْمُسْلِمِ لاَ يَتَحَاتُّ وَرَقُهَا ‏"‏ ‏.‏ قَالَ إِبْرَاهِيمُ لَعَلَّ مُسْلِمًا قَالَ وَتُؤْتِي أُكُلَهَا
 ‏.‏ وَكَذَا وَجَدْتُ عِنْدَ غَيْرِي أَيْضًا وَلاَ تُؤْتِي أُكُلَهَا كُلَّ حِينٍ ‏.‏ قَالَ ابْنُ عُمَرَ فَوَقَعَ فِي نَفْسِي
 أَنَّهَا النَّخْلَةُ وَرَأَيْتُ أَبَا بَكْرٍ وَعُمَرَ لاَ يَتَكَلَّمَانِ فَكَرِهْتُ أَنْ أَتَكَلَّمَ أَوْ أَقُولَ شَيْئًا فَقَالَ عُمَرُ
 لأَنْ تَكُونَ قُلْتَهَا أَحَبُّ إِلَىَّ مِنْ كَذَا وَكَذَا ‏.‏