It is narrated from Ibn Jurayj (may Allah have mercy on him), who reports: I asked Ata bin Abi Rabah (may Allah have mercy on him), "When the Prophet ﷺ delivered the sermon, did he stand leaning on a staff?" Ata (may Allah have mercy on him) said, "Yes, he ﷺ would stand leaning firmly on it."
Hadith Referenceمسند الإمام الشافعي / كتاب الجمعة / 443
Hadith Takhrijاسناده ضعيف لإساله، اخرجه البيهقى فى المعرفة السنن والآثار (1726) ۔ وعبدالرزاق (5246) واخرجه احمد: 314/3- موصولا بلفظ ”وهو متكى على قوس“