Sahih Muslim Book 30, Hadith Number 5759.

Chapter : The fragrance of the sacred body of Allah’s Apostle (may peace be upon him) and its agility and softness and the blessings of its touch.

Anas reported: I never smelt ambergris or musk as fragrant as the fragrance of the body of Allah’s Messenger (may peace be upon him) and I never touched brocade or silk and found it as soft as the body of Allah’s Messenger (may peace be upon him).