Verily when many of the sects and desires spread in his time: such as the Jahmiyyah, the Khawārij, the Murjiah, the Mu’tazilah, the Rāfidah, and others, they openly showed from their innovation and misguidance what they showed, he – rahimahullāh – and those who were with him in his time of leaders in hadīth and narration, rose to establish the Light of Allāh and to extinguish the fire of innovation. So he wrote his Book “As-Sunnah” as a refutation of the Jahmiyyah.
