The Messenger of Allah (s) said: O Nation! Surely, Allah has disliked for you to have twenty-four characteristics, and He has prohibited them from you. He has disliked for you: (1) fiddling in prayer, (2) reminding others of your goodwill to them, (3) smiling before graves, (4) browsing the houses [of people without their permission], (5) gazing at the private of women – and he said: it causes blindness – (6) speaking during intercourse – and he said: it causes muteness – (7) sleeping before the final `Isha’, (8) socializing after the final `Isha’, (9) bathing beneath the sky without a cover, (10) intercourse beneath the sky, (11) entering rivers naked – and he said: in the rivers are living quarters of angels – (12) entering the bathhouses naked, (13) speaking between the adhan and the iqama until the prayer has been completed, (14) setting sail in a frenzy, (15) sleeping on a roof that is not plastered – and he said: whoever sleeps on a roof that is not plastered, no one bears responsibility for him – (16) for a man to sleep alone in a house, (17) for a man to have intercourse with his wife while she is menstruating, for if he does so, the child will be leprous, and he will have no one to blame but himself, (18) for a man to have intercourse with a woman after having a wet dream without bathing himself from the dream that he had seen; for if he does that, the child will come to be insane, and he will have no one to blame but himself, (19) for a man to speak to a leper without being an armlength away – and he said: keep away from a leper just as you keep away from a lion – (20) urinating on a flowing river, (21) for a man to speak under a tree that has blossomed or a date palm whose fruits have ripened, (22) for a man to put on his sandals while he is standing, (23) for a man to enter a dark house without a lamp or a candle, and (24) to blow during prayer.