Hadith 1447
Sayyiduna Jabir bin Samurah (may Allah be pleased with him) reports that I saw the Messenger of Allah (peace and blessings be upon him) delivering the sermon on Friday while standing, then he (peace be upon him) sat down for a short while and did not speak. Then he (peace be upon him) stood up and delivered the second sermon. Therefore, whoever tells you that he saw the Messenger of Allah (peace and blessings be upon him) delivering the sermon while sitting, he has lied.