the insights of the spiritual masters, lingering for days; yet I accept it only with two trustworthy witnesses: the Book and the Sunnah.”

His companion Ahmad ibn Abī al-Hawārī said: “Whoever acts without following the Sunnah, his deed is invalid.”

Abū Hafs al-Naysābūrī said: “Whoever does not continually weigh his deeds and words against the Book and the Sunnah, and does not question his passing thoughts, do not count him among the ranks of men.”