It was narrated that Jabir bin Samurah said:
"I sat with the Prophet (ﷺ) and I did not see him deliver the khutbah except standing, and he sat, then he stood up and delivered the second khutbah." (IT)
App reference (IT): Book 14, Hadith 52 (IT)
English reference (IT): Vol. 2, Book 14, Hadith 1416 (IT)
Arabic reference (IT): Book 14, Hadith 1426 (IT)