It is narrated from Sayyidah Aishah (may Allah be pleased with her) that the Prophet (peace and blessings be upon him) had a pulpit placed for Sayyiduna Hassan (may Allah be pleased with him), upon which he would recite poetry satirising the polytheists.
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3568