حَدَّثَنَا مُحْرِزُ بْنُ سَلَمَةَ، حَدَّثَنَا عَبْدُ الْعَزِيزِ بْنُ مُحَمَّدٍ، عَنْ عُبَيْدِ اللَّهِ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ ـ صلى الله عليه وسلم ـ قَالَ ‏"‏ مَنْ أَحْرَمَ بِالْحَجِّ وَالْعُمْرَةِ كَفَى لَهُمَا طَوَافٌ وَاحِدٌ وَلَمْ يَحِلَّ حَتَّى يَقْضِيَ حَجَّهُ وَيَحِلَّ مِنْهُمَا جَمِيعًا ‏"‏ ‏.‏

It wasnarrated from Ibn ‘Umar that the Messenger of Allah (PBUH)said: “Whoever enters Ihram for Hajj and ‘Umrah, one Tawaf issufficient for both, and he should not exit Ihram until he hascompleted his Hajj, when he should exit Ihram for both.” Translation Not Available

Book Ref: Sunan Ibn Majah Book 25 Hadith 2975
Web Ref:  Sunan Ibn Majah Vol 4 Book 25 Hadith 2975