Some people went to Sahl bin Saʿd As-Saʿidi and told him that they had different opinions regarding the wood of the pulpit. They asked him about it and he said, "By Allah, I know of what wood the pulpit was made, and no doubt I saw it on the very first day when Messenger of Allah ﷺ took his seat on it. Messenger of Allah ﷺ sent for such and such an Ansari woman (and Sahl mentioned her name) and said to her, 'Order your slave-carpenter to prepare for me some pieces of wood (i.e. pulpit) on which I may sit at the time of addressing the people.' So she ordered her slave-carpenter and he made it from the tamarisk of the forest and brought it (to the woman). The woman sent that (pulpit) to Messenger of Allah ﷺ who ordered it to be placed here. Then I saw Messenger of Allah ﷺ praying on it and then bowed on it. Then he stepped back, got down and prostrated on the ground near the foot of the pulpit and again ascended the pulpit. After finishing the prayer he faced the people and said, 'I have done this so that you may follow me and learn the way I pray.' "  

وَاللَّهِ إِنِّي لأَعْرِفُ مِمَّا هُوَ وَلَقَدْ رَأَيْتُهُ أَوَّلَ يَوْمٍ وُضِعَ وَأَوَّلَ يَوْمٍ جَلَسَ عَلَيْهِ رَسُولُ اللَّهِ ﷺ أَرْسَلَ رَسُولُ اللَّهِ ﷺ إِلَى فُلاَنَةَ امْرَأَةٍ قَدْ سَمَّاهَا سَهْلٌ مُرِي غُلاَمَكِ النَّجَّارَ أَنْ يَعْمَلَ لِي أَعْوَادًا أَجْلِسُ عَلَيْهِنَّ إِذَا كَلَّمْتُ النَّاسَ فَأَمَرَتْهُ فَعَمِلَهَا مِنْ طَرْفَاءِ الْغَابَةِ ثُمَّ جَاءَ بِهَا فَأَرْسَلَتْ إِلَى رَسُولِ اللَّهِ ﷺ فَأَمَرَ بِهَا فَوُضِعَتْ هَا هُنَا ثُمَّ رَأَيْتُ رَسُولَ اللَّهِ ﷺ صَلَّى عَلَيْهَا وَكَبَّرَ وَهْوَ عَلَيْهَا ثُمَّ رَكَعَ وَهْوَ عَلَيْهَا ثُمَّ نَزَلَ الْقَهْقَرَى فَسَجَدَ فِي أَصْلِ الْمِنْبَرِ ثُمَّ عَادَ فَلَمَّا فَرَغَ أَقْبَلَ عَلَى النَّاسِ فَقَالَ أَيُّهَا النَّاسُ إِنَّمَا صَنَعْتُ هَذَا لِتَأْتَمُّوا وَلِتَعَلَّمُوا صَلاَتِي  

The Prophet ﷺ used to stand by a stem of a date-palm tree (while delivering a sermon). When the pulpit was placed for him we heard that stem crying like a pregnant she-camel till the Prophet ﷺ got down from the pulpit and placed his hand over it.  

كَانَ جِذْعٌ يَقُومُ إِلَيْهِ النَّبِيُّ ﷺ فَلَمَّا وُضِعَ لَهُ الْمِنْبَرُ سَمِعْنَا لِلْجِذْعِ مِثْلَ أَصْوَاتِ الْعِشَارِ حَتَّى نَزَلَ النَّبِيُّ ﷺ فَوَضَعَ يَدَهُ عَلَيْهِ قَالَ سُلَيْمَانُ عَنْ يَحْيَى أَخْبَرَنِي حَفْصُ بْنُ عُبَيْدِ اللَّهِ بْنِ أَنَسٍ أَنَّهُ سَمِعَ جَابِرًا  

My father said , "I heard the Prophet ﷺ delivering the Khutba on the pulpit and he said, 'Whoever comes for the Jumua prayer should take a bath (before coming).' "  

سَمِعْتُ النَّبِيَّ ﷺ يَخْطُبُ عَلَى الْمِنْبَرِ فَقَالَ مَنْ جَاءَ إِلَى الْجُمُعَةِ فَلْيَغْتَسِلْ