(230) باب الْخُطْبَةِ قَائِمًا
Jabir b. Samurah said:
The Messenger of Allah (ﷺ) used to deliver the sermon standing, then he would sit down, then stand and preach standing. If anyone tells you he preached sitting, he is lying. I swear by Allah that I offered along with more than two thousand prayers.
Reference: Sunan Abi Dawud 1093
In-book reference: Book 2, Hadith 704
English translation: Book 2, Hadith 1088