Rasulullah mandi janabah pada awal malam atau akhir malam
Imam Muslim : 465حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ حَدَّثَنَا لَيْثٌ عَنْ مُعَاوِيَةَ بْنِ صَالِحٍ عَنْ عَبْدِ اللَّهِ بْنِ أَبِي قَيْسٍ قَالَ سَأَلْتُ عَائِشَةَ عَنْ وِتْرِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَذَكَرَ الْحَدِيثَ قُلْتُ كَيْفَ كَانَ يَصْنَعُ فِي الْجَنَابَةِ أَكَانَ يَغْتَسِلُ قَبْلَ أَنْ يَنَامَ أَمْ يَنَامُ قَبْلَ أَنْ يَغْتَسِلَ قَالَتْ كُلُّ ذَلِكَ قَدْ كَانَ يَفْعَلُ رُبَّمَا اغْتَسَلَ فَنَامَ وَرُبَّمَا تَوَضَّأَ فَنَامَ قُلْتُ الْحَمْدُ لِلَّهِ الَّذِي جَعَلَ فِي الْأَمْرِ سَعَةً و حَدَّثَنِيهِ زُهَيْرُ بْنُ حَرْبٍ حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ مَهْدِيٍّ ح و حَدَّثَنِيهِ هَارُونُ بْنُ سَعِيدٍ الْأَيْلِيُّ حَدَّثَنَا ابْنُ وَهْبٍ جَمِيعًا عَنْ مُعَاوِيَةَ بْنِ صَالِحٍ بِهَذَا الْإِسْنَادِ مِثْلَهُ
Narrated to us by [Qutaibah bin Sa'id] Narrated to us by [Laith] from [Muawiyah bin Shalih] from [Abdullah bin Abi Qais] he said, "I asked [Aishah] about the witr of the Messenger of Allah peace be upon him. Then she mentioned a hadith. I asked, 'What should he do when in a state of major impurity, should he bathe before sleeping or sleep without bathing? ' Aishah replied, 'Indeed all of that has been done by him, sometimes he bathes then sleeps, sometimes he performs ablution then sleeps.' I said, 'All praise be to Allah who created in that matter some flexibility'." Narrated to me by [Zuhair bin Harb] Narrated to us by [Abdurrahman bin Mahdi] --through another chain of narration-- Narrated to me by [Harun bin Sa'id al-Aili] Narrated to us by [Ibn Wahb] all from [Muawiyah bin Shalih] with this chain a similar hadith.