(23) باب مَنْ رَأَى تَرْكَ النَّكِيرِ مِنَ النَّبِيِّ صلى الله عليه وسلم حُجَّةً لاَ مِنْ غَيْرِ الرَّسُولِ
Narrated Muhammad bin Al-Munkadir:
I saw Jabir bin `Abdullah swearing by Allah that Ibn Sayyad was the Dajjal. I said to Jabir, "How can you swear by Allah?" Jabir said, "I have heard `Umar swearing by Allah regarding this matter in the presence of the Prophet (ﷺ) and the Prophet (ﷺ) did not disapprove of it."
Reference: Sahih al-Bukhari 7355
In-book reference: Book 96, Hadith 82
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 9, Book 92, Hadith 453