أَخْبَرَنَا إِسْمَاعِيل بْنُ أَبَانَ، حَدَّثَنَا حَاتِمٌ هُوَ ابْنُ إِسْمَاعِيل، عَنْ عِيسَى، عَنْ الشَّعْبِيِّ، قَالَ: "إِيَّاكُمْ وَالْمُقَايَسَةَ، وَالَّذِي نَفْسِي بِيَدِهِ لَئِنْ أَخَذْتُمْ بِالْمُقَايَسَةِ لَتُحِلُّنَّ الْحَرَامَ وَلَتُحَرِّمُنَّ الْحَلَالَ، وَلَكِنْ مَا بَلَغَكُمْ عَمَّنْ حَفِظَ مِنْ أَصْحَابِ مُحَمَّدٍ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَاعْمَلُوا بِهِ".
Imam Sha’bi, may Allah have mercy on him, said: Beware of conjecture. By the One in Whose hand is my soul, if you engage in conjecture, you will surely make the unlawful lawful and the lawful unlawful. Therefore, act upon what has reached you from the preserved traditions of Muhammad’s (peace be upon him) companions.