Sayyiduna Abdullah bin al-Sa'di (may Allah be pleased with him) narrated that the Prophet (peace and blessings be upon him) said: "The best of my ummah are its earliest people, and in its last part there will be evil people; they will not be of me, and I will have nothing to do with them."
Imam al-Tabarani recorded it. Its chain contains a narrator, Yazid bin Rabi'ah, and he is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 16392