I used to apply perfume to the Messenger of Allah ﷺ before his entering upon the state of Ihram and at the conclusion of it, before circumambulating the House (for Tawaf Ifada).
أَنَّهَا قَالَتْ كُنْتُ أُطَيِّبُ رَسُولَ اللَّهِ ﷺ لإِحْرَامِهِ قَبْلَ أَنْ يُحْرِمَ وَلِحِلِّهِ قَبْلَ أَنْ يَطُوفَ بِالْبَيْتِ