It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) used to deliver the sermon leaning against this pillar; at that time, it was a trunk of a date-palm.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 4755
Hadith Gradingحکم دارالسلام:إسناده ضعيف أبى جناب، و أبوه أبو حية فى عداد المجهولين