The Prophet ﷺ delivered the sermon standing on his feet.
حدثنا وكيع حدثنا داود بن قيس عن عياض بن عبد الله بن أبي سرح
أن النبي ﷺ خطب قائما على رجليه
No references are available.
Its isnad is sahih. Dawud bin Qays al-Farra is trustworthy, and the hadith was narrated by Bukhari 2/12 in the chapter on the Friday sermon delivered while standing, Muslim 2/589 no. 862 in the chapter on the Friday sermon, mentioning the two sermons before the prayer, Abu Dawud 1/286 no. 1093, Nasai 3/110 no. 1417, and Ibn Majah 1/351 no. 1106.