Messenger of Allah (swt) (peace be upon him and his family) said: "Among the etiquettes of a guest is that he does not fast voluntarily except with the host's permission. Among the obedience of a wife to her husband is that she does not fast voluntarily except with his permission and instruction. Among the righteousness and obedience of a servant to his master is that he does not fast voluntarily except with his master's permission. Among the dutifulness of a child to their parents is that they do not fast voluntarily except with their parents' permission and command. Otherwise, the guest would be ignorant, the wife disobedient, the servant corrupt and sinful, and the child undutiful." [chapte=CHAPTER 54 - CHAPTER ON GHUSL (RITUAL PURIFICATION) ON SPECIFIC NIGHTS IN THE MONTH OF RAMADAN, AND WHAT HAS BEEN NARRATED ABOUT THE LAST TEN NIGHTS AND THE NIGHT OF QADR] بَابُ الْغُسْلِ فِي اللَّيَالِي الْمَخْصُوصَةِ فِي شَهْرِ رَمَضَانَ وَمَا جَاءَ فِي الْعَشْرِ الْأَوَاخِرِ وَفِي لَيْلَةِ الْقَدْرِ H1ِ 2015 - رَوَى اَلْعَلاَءُ عَنْ مُحَمَّدِ بْنِ مُسْلِمٍ عَنْ أَحَدِهِمَا عَلَيْهِمَا اَلسَّلاَمُ أَنَّهُ قَالَ: «يُغْتَسَلُ فِي ثَلاَثِ لَيَالٍ مِنْ شَهْرِ رَمَضَانَ فِي تِسْعَ عَشْرَةَ وَ إِحْدَى وَ عِشْرِينَ وَ ثَلاَثٍ وَ عِشْرِينَ وَ أُصِيبَ أَمِيرُ اَلْمُؤْمِنِينَ عَلَيْهِ اَلسَّلاَمُ فِي تِسْعَ عَشْرَةَ وَ قُبِضَ عَلَيْهِ اَلسَّلاَمُ فِي إِحْدَى وَ عِشْرِينَ » قَالَ «وَ اَلْغُسْلُ فِي أَوَّلِ اَللَّيْلِ وَ هُوَ يُجْزِي إِلَى آخِرِهِ ». Hadith.2015 - Al-'Ala narrated from Muhammad ibn Muslim from one of the Imams (as) that he said: "One should perform the ritual bath (ghusl) on three nights in the Month of Ramadan: the nineteenth, the twenty-first, and the twenty-third. The Commander of the Faithful (as) was struck on the nineteenth and passed away on the twenty-first." Imam (as) added: "The ghusl should be performed at the beginning of the night, and it suffices until its end."