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.
Sahih al-Bukhari Book 11, Hadith 42
← Previous Hadith Some people went to Sahl bin Sa`d As-Sa`idi 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 Allah's Messenger (ﷺ) took his seat on it. Allah's Messenger (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 Allah's Messenger (ﷺ) who ordered it to be placed here. Then I saw Allah's Messenger (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.' "

Sahih al-Bukhari Book 11, Hadith 41 Next Hadith → 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).' "

Sahih al-Bukhari Book 11, Hadith 43