4وَالَّذينَ يُؤمِنونَ بِما أُنزِلَ إِلَيكَ وَما أُنزِلَ مِن قَبلِكَ وَبِالآخِرَةِ هُم يوقِنونَZafar Ansariwho believe in the Book We have sent down to you (i.e. the Qur'an) and in the Books sent down before you, and firmly believe in the Hereafter.