I came to the Messenger of Allah ﷺ as he was encamping at Batha. He said to me: Did you intend to perform Hajj? I said: Yes. He again said: With what intention have you entered into the state of Ihram (for Ifrad, Qiran or Tamattu'). I said: I pronounced Talbiya (I have entered into the state of Ihram ) with that very aim with which the Messenger of Allah ﷺ is pronouncing Talbiya. He (the Holy Prophet) said; You have done well. Then circumambulate the House and run between al-Safa' and al-Marwa' and put off Ihram (as you have not brought the sacrificial animals along with you). So I circumambulated the House, and ran between al-Safa' and al-Marwa' and then came to a woman of the tribe of Qais and she rid my head of the lice. I again put on Ihram for Hajj. and continued giving religious verdict (according to this practice) till during the Caliphate of Umar (Allah be pleased with him) when a person said to him: Abu Musa, or Abdullah b. Qais, exercise restraint in delivering some religious verdict of yours, for you do not know what has been introduced after you by the Commander of the Believers in the rites (of Hajj). Thereupon he said: 0 people, whom we gave the religious verdict (concerning putting off Ihram ) they should wait, for the Commander of the Believers is about to come to you, and you should follow him. Umar (Allah be pleased with him) then came and I made a mention of it to him. whereupon he said: If we abide by the Book of Allah (we find) the Book of Allah has commanded us to complete the (. Hajj and 'Umra), and if we abide by the Sunnah of Messenger of Allah ﷺ, we find that Messenger of Allah ﷺ did not put off Ihram till the sacrificial animal was brought to its end (till it was sacrificed). (Using translation from Muslim 1221a)
قَدِمْتُ عَلَى النَّبِيِّ ﷺ وَهُوَ مُنِيخٌ بِالْأَبْطَحِ فَقَالَ لِي أَحَجَجْتَ؟ قُلْتُ نَعَمْ قَالَ فَبِمَ أَهْلَلْتَ؟ قَالَ قُلْتُ لَبَّيْكَ بِإِهْلَالٍ كَإِهْلَالِ النَّبِيِّ ﷺ قَالَ قَدْ أَحْسَنْتَ قَالَ طُفْ بِالْبَيْتِ وَبِالصَّفَا وَالْمَرْوَةِ ثُمَّ أَحِلَّ قَالَ فَطُفْتُ بِالْبَيْتِ وَبِالصَّفَا وَالْمَرْوَةِ ثُمَّ أَتَيْتُ امْرَأَةً مِنْ بَنِي قَيْسٍ فَفَلَّتْ رَأْسِي ثُمَّ أَهْلَلْتُ بِالْحَجِّ قَالَ فَكُنْتُ أُفْتِي بِهِ النَّاسَحَتَّى كَانَ خِلَافَةُ عُمَرَ فَقَالَ رَجُلٌ يَا أَبَا مُوسَى أَوْ يَا عَبْدَ اللهِ بْنَ قَيْسٍ رُوَيْدَكَ بَعْضَ فُتْيَاكَ؛ فَإِنَّكَ لَا تَدْرِي مَا أَحْدَثَ أَمِيرُ الْمُؤْمِنِينَ فِي شَأْنِ النُّسُكِ بَعْدَكَ قَالَ فَقَالَ يَا أَيُّهَا النَّاسُ مَنْ كُنَّا أَفْتَيْنَاهُ فُتْيَا فَلْيَتَّئِدْ؛ فَإِنَّ أَمِيرَ الْمُؤْمِنِينَ قَادِمٌ عَلَيْكُمْ فَبِهِ فَأْتَمُّوا قَالَ فَقَدِمَ عُمَرُ فَذَكَرْتُ ذَلِكَ لَهُ فَقَالَ إِنْ نَأْخُذْ بِكِتَابِ اللهِ فَإِنَّ كِتَابَ اللهِ تَعَالَى يَأْمُرُنَا بِالتَّمَامِ وَإِنْ نَأْخُذْ بِسُنَّةِ رَسُولِ اللهِ ﷺ فَإِنَّ رَسُولَ اللهِ ﷺ لَمْ يَحِلَّ حَتَّى بَلَغَ الْهَدْيُ مَحِلَّهُ