Musannaf Ibn Abi Shayba 36:437

'Isa ibn Yunus narrated to us, from Safwan ibn 'Amr al-Saksaki, from 'Abd al-Rahman ibn Jubayr ibn Nufayr, who said: When the grief of the companions of the Messenger of Allah (may Allah bless him and grant him peace) intensified over those of them who were struck down with Zayd on the day of Mu'tah, the Messenger of Allah (may Allah bless him and grant him peace) said: "There shall certainly reach the Messiah, from this nation, people who are like you or better"—three times—"and Allah will never disgrace a nation of which I am the first and the Messiah is the last."