The Indication of the Prophet's Actions in the Friday Sermon

Question:
The Honorable Shaykh, may Allah grant you success, mentioned that it is well known in the madhhab of Imam Ahmad in the principles of jurisprudence that the actions of the Messenger (peace and blessings be upon him) indicate recommendation, not obligation. So how did we take the actions of the Messenger (peace and blessings be upon him) in the Friday sermon to be obligatory and make them conditions for the validity of the sermon?

Answer:
Yes, because the Messenger (peace and blessings be upon him) said , which means that everything the Messenger did in the prayer is obligatory, unless there is evidence indicating that it is recommended. The default is that everything the Messenger did in the prayer is obligatory, based on this hadith, except for what evidence indicates is a sunnah (recommended practice).