He returned home again full of grief and rage; and, going into his mother’s apartment, said, Ah! madam, you was in the right of it; instead of friends, I have found none but ungrateful, perfidious wretches, who deserve not my friendship; whom I renounce, and promise never to see them more. He resolved to be as good as his word; and, to that end, took all possible precautions to avoid falling into the same inconvenience, taking an oath never to give an inhabitant of Bagdad any entertainment again. Afterwards he opened a strong chest, in which he had put the rents he had received from his estate, and resolved to take every day a sum that was sufficient to defray the expense of a single person to sup with him; who, according to the oath he had taken, must be a stranger that came into Bagdad the same day, and must take his leave of him the next morning. According to this project, Abon Hassan took care every morning to provide whatever he designed for night, and towards the close of the evening went and sat on Bagdad bridge; and, as soon as ever he saw a stranger, of whatever condition he was, he accosted him civilly, and invited him to sup and lodge with him that night; and, after having informed him of the law he had imposed upon himself, took him home with him. The repast with which Abon Hassan regaled his guests was not costly, but always plain and neat, with plenty of good wine, and generally lasted till the night was pretty well advanced; when, instead of entertaining his guest with the affairs of state, his family or business, as is too frequent, he affected to talk of indifferent subjects, and was naturally of so gay and pleasant a temper, that he could give the most agreeable turns in conversation, and make the most reserved and melancholy persons merry. When he saw his guest again the next morning, he always said to him, God preserve you from all sorrow wherever you go: when I invited you yesterday to come and sup with me, I informed you of the law I have made; therefore do not take it ill if I tell you that we must never see one another again, nor drink together, for reasons best known to myself: so God conduct you. Abon Hassan was very exact in the observation of this oath, and never looked upon, or spoke to, any stranger he had once entertained, wherever he met them; and had lived for a long time after this manner, when one afternoon, a little before sunset, as he was sitting upon the bridge, according to custom, the caliph Haroun Alraschid came by so disguised that nobody could know him: for that monarch, though his chief ministers and officers of justice acquitted themselves of their duty very punctually, yet would take notice of every thing himself; and, to that purpose, often disguised himself, and walked through the city and suburbs of Bagdad; and that day was dressed like a merchant of Moussel, who had but just disembarked, and was followed by a slave.