Allah said,

﴿وَإِن مِّنْ أَهْلِ الْكِتَـبِ إِلاَّ لَيُؤْمِنَنَّ بِهِ قَبْلَ مَوْتِهِ وَيَوْمَ الْقِيَـمَةِ يَكُونُ عَلَيْهِمْ شَهِيداً ﴾

(And there is none of the People of the Scripture, but must believe in him, before his death. And on the Day of Resurrection, he will be a witness against them.) Ibn Jarir recorded that Ibn `Abbas commented,

﴿وَإِن مِّنْ أَهْلِ الْكِتَـبِ إِلاَّ لَيُؤْمِنَنَّ بِهِ قَبْلَ مَوْتِهِ﴾

(And there is none of the People of the Scripture, but must believe in him, before his death.) before the death of `Isa, son of Maryam, peace be upon him. Al-`Awfi reported similar from Ibn `Abbas. Abu Malik commented;

﴿إِلاَّ لَيُؤْمِنَنَّ بِهِ قَبْلَ مَوْتِهِ﴾

(but must believe in him, before his death.) "This occurs after `Isa returns and before he dies, as then, all of the People of the Scriptures will believe in him.''