Sunan an-Nasa'i #405 · The Book of Ghusl and Tayammum

Sunan an-Nasa'iIt was narrated that Ghudaif bin Al-Harith said
Sunan an-Nasa'i · Book 4 · The Book of Ghusl and Tayammum
Sunan an-Nasa'i · كتاب 4 · كتاب الغسل والتيمم
"I entered upon 'Aishah and asked her: 'Did the Messenger of Allah (ﷺ) perform Ghusl at the beginning of the night or at the end?' She said: 'Both. Sometimes he performed Ghusl at the beginning and sometimes at the end.' I said: 'Praise be to Allah who has made the matter flexible
أَخْبَرَنَا يَحْيَى بْنُ حَبِيبِ بْنِ عَرَبِيٍّ، قَالَ حَدَّثَنَا حَمَّادٌ، عَنْ بُرْدٍ، عَنْ عُبَادَةَ بْنِ نُسَىٍّ، عَنْ غُضَيْفِ بْنِ الْحَارِثِ، قَالَ دَخَلْتُ عَلَى عَائِشَةَ فَسَأَلْتُهَا فَقُلْتُ أَكَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم يَغْتَسِلُ مِنْ أَوَّلِ اللَّيْلِ أَوْ مِنْ آخِرِهِ قَالَتْ كُلُّ ذَلِكَ كَانَ رُبَّمَا اغْتَسَلَ مِنْ أَوَّلِهِ وَرُبَّمَا اغْتَسَلَ مِنْ آخِرِهِ ‏‏.‏‏ قُلْتُ الْحَمْدُ لِلَّهِ الَّذِي جَعَلَ فِي الأَمْرِ سَعَةً ‏‏.‏‏
Reference : Sunan an-Nasa'i 405In-book reference : Book 4, Hadith 10