Abū Ja‘far ibn Rizq—may Allah Most High have mercy on him—and following his method and example in this regard. Yet I treated these matters more extensively than he did, particularly at the beginning of the Book of Ablution. There I would discuss the subject at length, building upon preliminary discussions of beliefs concerning the foundations of religion and of the principles of jurisprudence governing religious rulings. Ignorance of these matters is inexcusable, and no sound understanding of any branch of religious law can be attained without first understanding them.
He nevertheless deserves the credit for having preceded me: he charted the course, clarified the path and showed the way through an approach that none of his own teachers had adopted before him. I once asked him—may Allah Most High have mercy on him—how his teacher, the jurist Abū ‘Umar ibn al-Qattān, would open his discussions at the beginning of the books of al-Mudawwana. He told me, “He would add nothing to what Ibn Abī Zayd mentioned at the beginning of the books in his abridgement.” His teacher did not reach the level that Abū Ja‘far was enabled to attain. Indeed, Abū Ja‘far—may Allah grant him the fullest honour in His presence—had a deeper understanding of jurisprudence than his teachers and was more beneficial to students. This is hardly surprising: someone may convey knowledge of jurisprudence to another who understands it better, or transmit a hadith to someone who comprehends it more fully. Success rests with Allah; He grants it to whomever He wills.
I therefore granted the questioner’s request, hoping for Allah Most High’s reward and seeking His gracious recompense. To this I added discussions of certain particular questions on which I would digress, questions presented incompletely and in scattered places in al-Mudawwana. I brought them together, set them out concisely, and explained them clearly along with their underlying reasons. The result was a useful work, the like of which none of my predecessors had produced. I entitled it Preparatory Introductions for Establishing the Religious Rulings Contained in the Sections of al-Mudawwana, and Rigorous Analyses of Its Principal Difficult Questions.
I ask Allah, by His might and mercy, for success in word and deed and for protection from deviation and error.