Sahih Muslim 1244
Sahih Muslim · Book 15: The Book of Pilgrimage · Marking and Garlanding the sacrificial animal when entering Ihram
Abu Hassan reported:
وَحَدَّثَنِي أَحْمَدُ بْنُ سَعِيدٍ الدَّارِمِيُّ ، حَدَّثَنَا أَحْمَدُ بْنُ إِسْحَاقَ ، حَدَّثَنَا هَمَّامُ بْنُ يَحْيَى ، عَنْ قَتَادَةَ ، عَنْ أَبِي حَسَّانَ ، قَالَ قِيلَ لاِبْنِ عَبَّاسٍ إِنَّ هَذَا الأَمْرَ قَدْ تَفَشَّغَ بِالنَّاسِ مَنْ طَافَ بِالْبَيْتِ فَقَدْ حَلَّ الطَّوَافُ عُمْرَةٌ . فَقَالَ سُنَّةُ نَبِيِّكُمْ صلى الله عليه وسلم وَإِنْ رَغِمْتُمْ .
It was said to Ibn 'Abbas (Allah be pleased with them) that this affair had engaged the attention of the people that he who circumambu- lates the House was permitted to circumambulate for Umra (even though he was in a state of Ihram for Hajj), whereupon he said: That is the Sunnah of your Apostle (ﷺ), even though you may not approve of it.