Fiqh-us-Sunnah Volume 1, Purification and Prayer, Fiqh 1.024.

These are pleasing to the soul and beautify the atmosphere. Anas reported the Messenger of Allah as saying, “Among the things of this world, I love women and perfume, and the coolness of my eyes is prayer.” (Related by Ahmad and an-Nasa’i.) Abu Hurairah reported that the Messenger of Allah said, “If someone offers perfume, do not reject it, for it is light to carry and has a sweet scent.” (Related by Muslim, an-Nasa’i and Abu Dawud.) Abu Sa’eed reported that the Prophet said about musk, “It is the best of perfumes.” (Related by “the group,” except for al-Bukhari and Ibn Majah).

Nafa’ narrated that Ibn ‘Umar used to burn and inhale a branch called aluwah that has a nice smell. He also used camphor. He used to say, “This is the way the Messenger of Allah inhaled such scents (that is, by burning them.)” (Related by Muslim and an-Nasa’i.)