Chapter 96: Holding Fast to the Qur'an and Sunnah
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."
Sahih al-Bukhari 7355