(52) باب فَضْلِ الصَّحَابَةِ ثُمَّ الَّذِينَ يَلُونَهُمْ ثُمَّ الَّذِينَ يَلُونَهُمْ
This hadith has been narrated on the authority of 'Imran b. Husain through another chain of transmitters (and the words are):
The best generation of this Umma is the generation to which I have been sent, then the next one, and there is an addition in the hadith transmitted on the authority of Abu 'Awana (and the words are): And Allah knows best whether he made a mention of the third (generation) or not; the rest of the hadith is the same as transmitted by Zahdam on the authority of 'Imran. And in the hadith transmitted by Hisham on the authority of Qatada there is an addition of these words: They take an oath whereas they are not asked to take.
Reference: Sahih Muslim 2535 c
In-book reference: Book 44, Hadith 306
USC-MSA web (English) reference(deprecated numbering scheme): Book 31, Hadith 6158