وَإِن مِّنْ أَهْلِ الْكِتَابِ إِلاَّ لَيُؤْمِنَنَّ بِهِ قَبْلَ مَوْتِهِ وَيَوْمَ الْقِيَامَةِ يَكُونُ عَلَيْهِمْ شَهِيدًا
“And there is not one of the followers of the Book but most certainly believes in Him before his death, and on the day of resurrection he (Isa) shall be a witness against them.”
Shahr bin Hawshab narrates, “Hajjaj said to me, “O Shahr! One of the verses in Quran has confused me.” I replied, “O master! To which verse are you referring?”
He replied, “And there is not one of the followers of the Book but most certainly believes in Him before his death. I have slaughtered many Jews and Christians. I look at their mouths after I have slain them, but I do not see their mouths moving nor do they testify to anything.”
I replied, “O master! It does not mean what you think. It means Hazrat Isa (as) will come back to this world before the Day of Judgement. He will pray behind Imam Mahdi (as) and all will believe in Him.”
Hajjaj said, “Woe unto you! How do you know this?” I replied, “Mohammed (as) bin Ali (Imam Baqir (as) bin Hussain (as) bin Ali (as) bin Abi Talib (as) narrated this for me.” He replied, “Then I swear by Allah that you have received this form a purified source”. (Tafseer Al Qummi volume 1 page 158)