Ibn 'Abbas رضی اللہ عنہما 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 honied 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.