‘Abdur-Rahman bin Sa’d bin ‘Ammar bin Sa’d narrated that his
father
told him, from his father, from his grandfather, that when the
Messenger of Allah (ﷺ) delivered a speech on the battlefield he
would do so leaning on a bow, and when he delivered a sermon on
Friday, he would do so leaning on his staff.
Sunan Ibn Majah Book 5, Hadith 305