Hafs bin Ubaydullah bin Anas bin Malik (may Allah have mercy on him) said: I heard Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) say that in the time of the Prophet (peace and blessings be upon him) the roof of the mosque rested on trunks of date palms. When the Prophet (peace and blessings be upon him) delivered the sermon, he would stand by a trunk. When the pulpit was made, he (peace and blessings be upon him) would be upon that pulpit, and we heard from that trunk a sound like the sound of camels heavy with young, until the Messenger of Allah (peace and blessings be upon him) came and placed his hand on it, and it became quiet.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5696