Narrated Ka`b bin `Umra:
Allah's Messenger (ﷺ) stood beside me at Al-Hudaibiya 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 if any of you is ill, or has ailment in his scalp (2.196), etc. was revealed regarding me. "The Prophet (ﷺ) then ordered me either to fast three days, or to feed six poor persons with one Faraq (three Sas) (of dates), or to slaughter a sheep, etc. (sacrifice) whatever was available.
Narrated Abu Musa:
The Prophet (ﷺ) sent me to some people in Yemen and when I returned, I found him at Al-Batha. He asked me, "With what intention have you assumed Ihram (i.e. for Hajj or for Umra or for both?") I replied, "I have assumed Ihram with an intention like that of the Prophet." He asked, "Have you a Hadi with you?" I replied in the negative. He ordered me to perform Tawaf round the Ka`ba and between Safa and Marwa and then to finish my Ihram. I did so and went to a woman from my tribe who combed my hair or washed my head. Then, when `Umar came (i.e. became Caliph) he said, "If we follow Allah's Book, it orders us to complete Hajj and Umra; as Allah says: "Perform the Hajj and Umra for Allah." (2.196). And if we follow the tradition of the Prophet (ﷺ) who did not finish his Ihram till he sacrificed his Hadi."
Ibn 'Abbas said that he has been asked regarding Hajj-at-Tamattu' on which he said: "The Muhajirin and the Ansar and the wives of the Prophet (ﷺ) and we did the same. When we reached Makkah, Allah's Messenger (ﷺ) said, "Give up your intention of doing the Hajj (at this moment) and perform 'Umra, except the one who had garlanded the Hady." So, we performed Tawaf round the Ka'bah and [Sa'y] between As-safa and Al-MArwa, slept with our wives and wore ordinary (stitched) clothes. The Prophet (ﷺ) added, "Whoever has garlanded his Hady is not allowed to finish the Ihram till the Hady has reached its destination (has been sacrificed)". Then on the night of Tarwiya (8th Dhul Hijjah, in the afternoon) he ordered us to assume Ihram for Hajj and when we have performed all the ceremonies of Hajj, we came and performed Tawaf round the Ka'bah and (Sa'y) between As-Safa and Al-Marwa, and then our Hajj was complete, and we had to sacrifice a Hady according to the statement of Allah: "... He must slaughter a Hady such as he can afford, but if he cannot afford it, he should observer Saum (fasts) three days during the Hajj and seven days after his return (to his home)…." (V. 2:196). And the sacrifice of the sheep is sufficient. So, the Prophet (ﷺ) and his Companions joined the two religious deeds, (i.e. Hajj and 'Umra) in one year, for Allah revealed (the permissibility) of such practice in His book and in the Sunna (legal ways) of His Prophet (ﷺ) and rendered it permissible for all the people except those living in Makkah. Allah says: "This is for him whose family is not present at the Al-Masjid-Al-Haram, (i.e. non resident of Makkah)." The months of Hajj which Allah mentioned in His book are: Shawwal, Dhul-Qa'da and Dhul-Hijjah. Whoever performed Hajj-at-Tamattu' in those months, then slaughtering or fasting is compulsory for him. The words: 1. Ar-Rafatha means sexual intercourse. 2. Al-Fasuq means all kinds of sin, and 3. Al-Jidal means to dispute.
Narrated Ka`b bin Ujra:
We were in the company of Allah's Messenger (ﷺ) at Al-Hudaibiya in the state of Ihram and the pagans did not allow us to proceed (to the Ka`ba). I had thick hair and lice started falling on my face. The Prophet (ﷺ) passed by me and said, "Are the lice of your head troubling you?" I replied, Yes." (The sub-narrator added, "Then the following Divine Verse was revealed:-- "And if anyone of you is ill or has an ailment in his scalp, (necessitating shaving) must pay a ransom (Fida) of either fasting or feeding the poor, Or offering a sacrifice." (2.196)