It is narrated from Sayyiduna Zayd bin Arqam (may Allah be pleased with him); he said: A man from the People of the Book said: "O Abu al-Qasim! You claim that the people of Paradise will eat and drink?" He (peace and blessings be upon him) said: "Yes, by the One in whose hand is my soul! Each of them will be given the strength of a hundred men in eating, drinking, intercourse and desire." He said: "But whoever eats also has a need to relieve himself?" He said: "The need of each of them is sweat like the fragrance of musk, by which his stomach will become slender."
Hadith Referenceالمعجم الكبير للطبراني / باب الزاي / 4989