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." (PT)
App reference (PT): Book 14, Hadith 52 (PT)
English reference (PT): Vol. 2, Book 14, Hadith 1416 (PT)
Arabic reference (PT): Book 14, Hadith 1426 (PT)