I used to apply perfume to the Messenger of Allah ﷺ when he entered the state of ihram and when he exited it.
حدثنا يزيد قال أخبرنا محمد بن عمرو عن أبيه عن جده علقمة بن وقاص
كنت أطيب رسول الله ﷺ حين يحرم وحين يحل
Its chain of transmission is sahih. It was mentioned previously at 25628.