Nafi' narrates from Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) used to deliver the sermon leaning against a trunk. When he (peace and blessings be upon him) had a minbar made, that trunk cried; then he (peace and blessings be upon him) held it close to himself.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجمعة / 5700