ʿUyūn akhbār al-Riḍā
Hadith 181181 - وَبِهذَا الإسناد قالَ: قالَ رَسُولَ اللَّهِ صَلَّى اللهُعَلَيْهِ وَآلِهِ: مَن قاتَلَنا آخِرَ الزَّمان فَكَأنَّما قاتَلنا مَعَ الدَّجَّالِ.
31-181 According to the same documentation, God’s Prophet (S) said, “Whoever fights against us at the end of time, it is as if he has fought against us along with Dajjal (the anti-Christ).”