Sahih Muslim
The Book Pertaining to Paradise, Its Description, Its Bounties and Its Intimates (Kitab Al-Jannat wa Sifat Naimiha wa Ahliha)
Book Number: 040 / Hadith Number: 6800
Jabir b. Abdullah reported that Allah's Messenger (may peace be upon him) said that the inmates of Paradise would eat therein and they would also drink, but they would neither void excrement, nor suffer catarrh, nor pass water, and their eating (would be digested) in the form of belching and their sweat would be musk aged they would glorify and praise Allah as easily ai you breathe.