51. Abú Muḥammad Aḥmad b. al-Ḥusayn al-Jurayrí.
He was an intimate friend of Junayd, and also associated with Sahl b. `Abdalláh. He was learned in every branch of science and was the Imám of his day in jurisprudence, besides being well acquainted with theology. His rank in Ṣúfiism was such that Junayd said to him: “Teach my pupils discipline and train them!” He succeeded Junayd and sat in his chair. It is related that he said: “The permanence of faith and the subsistence of religions and the health of bodies depend on three qualities: satisfaction (iktifá) and piety (ittiqá) and abstinence (iḥtimá): if one is satisfied with God, his conscience becomes good; and if one guards himself from what God has forbidden, his character becomes upright; and if one abstains from what does not agree with him, his constitution is brought into good order. The fruit of satisfaction is pure knowledge of God, and the result of piety is excellence of moral character, and the end of abstinence is equilibrium of constitution.” The Apostle said, “He that prays much by night, his face is fair by day,” and he also said that the pious shall come at the Resurrection “with resplendent faces on thrones of light”.