The Imam questioning his companions in order to test their knowledge
باب طَرْحِ الإِمَامِ الْمَسْأَلَةَ عَلَى أَصْحَابِهِ لِيَخْتَبِرَ مَا عِنْدَهُمْ مِنَ الْعِلْمِ
Sahih al-Bukhari, Book of Knowledge(view book)
Sahih al-Bukhari 62
Narrated Ibn 'Umar:
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 Allah's Apostle?" He replied, "It is the date-palm tree."
حَدَّثَنَا خَالِدُ بْنُ مَخْلَدٍ، حَدَّثَنَا سُلَيْمَانُ، حَدَّثَنَا عَبْدُ اللَّهِ بْنُ دِينَارٍ، عَنِ ابْنِ عُمَرَ، 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 ".