It is narrated from Sayyidah Umm Salamah (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) used to deliver the sermon leaning against a palm-trunk in the mosque. When the pulpit was made, the trunk began to weep, so the Prophet (peace and blessings be upon him) embraced it and it became quiet.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19828