Sayyiduna Imran bin Husayn (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him) that he (peace and blessings be upon him) said: "My generation is the best, then those who come after them. Then a people will come who will make vows but not fulfil them, who will swear oaths without being asked to swear, who will betray and will not be trustworthy, who will testify without being asked to testify, and obesity will become widespread among them."
Abu al-Fadl relates in his narration: I heard Ahmad bin Salamah saying that the words "they will swear oaths" occur only in the narration of Hisham among the students of Qatadah. This addition is narrated only by Mu'adh bin Hisham from his father.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 20599