Had not the Grace of Allah and His Mercy been upon you ( O Muhammad SAW ) , a party of them would certainly have made a decision to mislead you , but ( in fact ) they mislead none except their own selves , and no harm can they do to you in the least . Allah has sent down to you the Book ( The Quran ) , and Al-Hikmah ( Islamic laws , knowledge of legal and illegal things i.e. the Prophet 's Sunnah - legal ways ) , and taught you that which you knew not .