Musannaf Ibn Abi Shayba 36:306

Abdullah ibn Idris narrated to us, from Muhammad ibn Ishaq, from al-Zuhri, from Urwah ibn al-Zubayr, from Marwan, that the Messenger of Allah (may Allah bless him and grant him peace) went out in the year they obstructed him. When he reached al-Hudaybiyah, he stayed in the *hill* (the area outside the sacred boundary), and his place of prayer was in the *haram* (the sacred boundary). When they wrote the treaty and finished it, a great distress entered upon the people because of that. He said: The Messenger of Allah (may Allah bless him and grant him peace) said: "O people, sacrifice, shave, and exit the state of ihram." But not a single man among the people stood up. Then he repeated it, but not a single man among the people stood up. So he entered upon Umm Salamah and said: "Do you see what has entered upon the people?" She said: "O Messenger of Allah, go and sacrifice your sacrificial animal, shave, and exit the state of ihram, for the people will surely exit the state of ihram." So the Messenger of Allah (may Allah bless him and grant him peace) sacrificed, shaved, and exited the state of ihram.