قَالُوا يَا قَوْمَنَا إِنَّا سَمِعْنَا كِتَابًا أُنزِلَ مِن بَعْدِ مُوسَىٰ مُصَدِّقًا لِّمَا بَيْنَ يَدَيْهِ يَهْدِي إِلَى الْحَقِّ وَإِلَىٰ طَرِيقٍ مُّسْتَقِيمٍ (30)
(46:30) They said: 'Our people, We have heard a Scripture revealed after Moses, verifying the Scriptures revealed before it; it guides to the Truth and to the Straight Way. *34
*34) This shows that these jinns had already had faith in the Prophet Moses and in the Divine Books. After hearing the Qur'an they felt that it gave the same teachings as the former Prophets had been preaching. Therefore, they believed in this Book forthwith and also in the Holy prophet who had brought it.