Sahih Muslim #2991 · The Book of Pilgrimage

Sahih MuslimNafi' reported that Ibn Umar intended to go to Hajj
Sahih Muslim · Book 15 · The Book of Pilgrimage
Sahih Muslim · كتاب 15 · كتاب الحج
He who combines Hajj with Umra, for him one single circumambulation is sufficient, and he did not put off Ihram until he had completed both of them.
وَحَدَّثَنَاهُ ابْنُ نُمَيْرٍ، حَدَّثَنَا أَبِي، حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ نَافِعٍ، قَالَ أَرَادَ ابْنُ عُمَرَ الْحَجَّ حِينَ نَزَلَ الْحَجَّاجُ بِابْنِ الزُّبَيْرِ ‏.‏ وَاقْتَصَّ الْحَدِيثَ بِمِثْلِ هَذِهِ الْقِصَّةِ وَقَالَ فِي آخِرِ الْحَدِيثِ وَكَانَ يَقُولُ مَنْ جَمَعَ بَيْنَ الْحَجِّ وَالْعُمْرَةِ كَفَاهُ طَوَافٌ وَاحِدٌ وَلَمْ يَحِلَّ حَتَّى يَحِلَّ مِنْهُمَا جَمِيعًا ‏.‏
Reference : Sahih Muslim 2991In-book reference : Book 15, Hadith 199