“Whoever enters Ihram for Hajj and ‘Umrah, one Tawaf is sufficient for both, and he should not exit Ihram until he has completed his Hajj, when he should exit Ihram for both.” (Using translation from Ibn Mājah 2975)   

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ «مَنْ أَهَلَّ بِالْحَجِّ وَالْعُمْرَةِ كَفَاهُ لَهُمَا طَوَافٌ وَاحِدٌ وَلَا يَحِلُّ حَتَّى يَحِلَّ مِنْهُمَا»