Allah's Messenger (ﷺ) was prevented from performing (' Umra). Therefore, he shaved his head and had sexual relations with his wives and slaughtered his Hady and performed ' Umra in the following year. [3:36-0.B]

Ibn 'Umar used to say, "Is not (the following of) the Sunna (legal ways) of Allâh's Messenger (ﷺ) sufficient for you? If anyone of you is prevented from performing Hajj, he should perform the Tawâf of the Ka'ba and Sa'y (going) between-Şafa and Al-Marwa and then finish the and everything will become legal for him which was illegal for himn (during the state of) and he can perform Hajj in a following year and he should slaughter a Hady or observe Şaum (fast) in case he cannot afford the Hady." [3:37-0.B]

Allah's Messenger (ﷺ) slaughtered (the Hady) before he had his head shaved and then he ordered his companions to do the same. [3:38-O.B]

Allâh's Messenger (ﷺ) stood beside me at Al-Hudaibîya and the lice were falling from my head in great number. He asked me, "Have your lice troubled you?" I replied in the affirmative. He ordered me to get my head shaved. Ka'b added, "This Holy Verse: ' And whosoever of you is ill, or has an ailment in his scalp (V.2:196), etc. ' was revealed regarding me." The Prophet (ﷺ) then ordered me either to observe Șaum (fast) for three days, or to feed six poor persons with one Faraq (three) (of dates), or to slaughter a sheep, etc. (sacrifice) whatever was available. [3:42-O.B]