Aḥmad b. Yūnus reports:

I saw Zuhayr b. Muʿāwiyah come to Zāʾidah b. Qudāmah (d.160H) and speak to him to get him to narrate ḥadīth to a man, so Zāʾidah asked, "Is he from Ahl Al-Sunnah?" Zuhayr replied, "I do not know that he has any bidʿah." Zāʾidah said, "No, that is another matter! Is he from Ahl Al-Sunnah?" Zuhayr said, Since when have people become like this? Zāʾidah replied, "Since when did people curse Abū Bakr and ʿUmar?!"

Al-Khaṭīb Al-Baghdādī, Al-Jāmiʿ li Akhlāq Al-Rāwī #754.