Qur'ān 28:49 · Al-Qasas (القصص)

قُلْ فَأْتُوا۟ بِكِتَـٰبٍۢ مِّنْ عِندِ ٱللَّهِ هُوَ أَهْدَىٰ مِنْهُمَآ أَتَّبِعْهُ إِن كُنتُمْ صَـٰدِقِينَ

Say, "Then bring a scripture from Allah which is more guiding than either of them that I may follow it, if you should be truthful."