Musnad Abu Ya'la al-Mawsili 109:271

Ibn Numayr narrated to us, Abu Mu'awiyah narrated to us, from al-A'mash, from Abu Sufyan, from Jabir, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The people of Paradise will eat and drink therein, and they will not defecate, nor will they urinate, nor will they blow their noses. But [their waste] will be like the perspiration of musk."