And when he performs his devotions and is about to go to bed, let him say, as in secret converse with God: “O Lord God, Thou hast mingled lust with Adam’s clay in order that the world may be populated, and Thou in Thy knowledge hast willed that I should have this intercourse. Cause it to be for the sake of two things: firstly, to guard that which is unlawful by means of that which is lawful; and secondly, vouchsafe to me a child, saintly and acceptable, not one who will divert my thoughts from Thee.” It is related that a son was born to Sahl b. `Abdalláh al-Tustarí. Whenever the child asked his mother for food, she used to bid him ask God, and while he went to the niche (_miḥráb_) and bowed himself in prayer, she used secretly to give him what he wanted, without letting him know that his mother had given it to him. Thus he grew accustomed to turn unto God. One day he came back from school when his mother was absent, and bowed himself in prayer. God caused the thing that he sought to appear before him. When his mother came in she asked, “Where did you get this?” He answered, “From the place whence it comes always.” Footnote 176: Here a story is told of the Caliph `Umar, who asked Umm Kulthúm, the Prophet’s granddaughter, in marriage from her father `Alí. The practice of an Apostolic rule of life must not lead the dervish to seek worldly wealth and unlawful gain or preoccupy his heart, for the dervish is ruined by the destruction of his heart, just as the rich man is ruined by the destruction of his house and furniture; but the rich man can repair his loss, while the dervish cannot. In our time it is impossible for anyone to have a suitable wife, whose wants are not excessive and whose demands are not unreasonable. Therefore many persons have adopted celibacy and observe the Apostolic Tradition: “The best of men in latter days will be those who are light of back,” i.e. who have neither wife nor child. It is the unanimous opinion of the Shaykhs of this sect that the best and most excellent Ṣúfís are the celibates, if their hearts are uncontaminated and if their natures are not inclined to sins and lusts. The vulgar, in gratifying their lusts, appeal to the Apostle’s saying, that the three things he loved in the world were scent, women, and prayer, and argue that since he loved women marriage must be more excellent than celibacy. I reply: “The Apostle also said that he had two trades, namely, poverty (_faqr_) and the spiritual combat (_jihád_): why, then, do ye shun these things? If he loved that (viz. marriage), this (viz. celibacy) was his trade. Your desires have a greater propensity to the former, but it is absurd, on that ground, to say that he loves what you desire. Anyone who follows his desires for fifty years and supposes that he is following the practice of the Apostle is in grave error.” A woman was the cause of the first calamity that overtook Adam in Paradise, and also of the first quarrel that happened in this world, i.e.