Musnad Ahmad 33:31

'Abd al-Razzaq narrated to us, Ibn Jurayj informed us, and Rawh narrated to us, Ibn Jurayj narrated to us, Abu al-Zubayr informed us that he heard Jabir ibn 'Abd Allah saying: "When the Prophet, peace and blessings of Allah be upon him, would deliver a sermon, he would lean against a trunk of a date palm tree from the pillars of the mosque. When his pulpit was made for him and he sat upon it, that pillar shook like the moaning of a she-camel, until the people of the mosque heard it, until he descended to it and embraced it, and it became quiet." Rawh said: "And it became quiet." Ibn Bakr said: "And that pillar shook." Rawh said: "It shook like the moaning."