It is narrated from Sayyiduna Imran bin Husayn (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The best of my Ummah is the generation among whom I am, then those who come after them, then those who come after them. Then people will come who will be fat and will love obesity, and who will give testimony without being asked for it."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 15674