Musannaf Ibn Abi Shaybah 39628 — The Hudaybiyah campaign

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that when the sacrificial animals were (still) short of the mountains from which the valley of al-Thaniyyah comes into view, the polytheists confronted him (peace and blessings be upon him) and turned back his (peace and blessings be upon him) sacrificial animals. So the Messenger of Allah (peace and blessings be upon him) slaughtered them at the very place where the polytheists had stopped him (peace and blessings be upon him), and this place was al-Hudaybiyah. (Then) he (peace and blessings be upon him) had his head shaved, and people, following his (peace and blessings be upon him) example, also had their heads shaved. Some others waited, and they said: "Perhaps we will circle the House of Allah." (At this) the Messenger of Allah (peace and blessings be upon him) said: "May Allah Almighty have mercy on those who shave their heads." It was said (to him (peace and blessings be upon him)): "And those who shorten their hair?" He (peace and blessings be upon him) said (again): "May Allah Almighty have mercy on those who shave their heads." He (peace and blessings be upon him) said this three times.