I used to perfume the Messenger of Allah ﷺ with a perfume containing musk before entering upon the state of Ihram and on the day of sacrifice (10th of Dhu'l-Hijja) and (at the conclusion of Ihram) before circumambulating the House (for Tawaf-i-Ifada).
كُنْتُ أُطَيِّبُ النَّبِيَّ ﷺ قَبْلَ أَنْ يُحْرِمَ وَيَوْمَ النَّحْرِ قَبْلَ أَنْ يَطُوفَ بِالْبَيْتِ بِطِيبٍ فِيهِ مِسْكٌ