"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.'" (Using translation from Nasāʾī 223)  

دَخَلْتُ عَلَى عَائِشَةَ فَسَأَلْتُهَا فَقُلْتُ أَكَانَ رَسُولَ اللهِ ﷺ يَغْتَسِلُ مِنْ أَوَّلِ اللَّيْلِ أَوْ مِنْ آخِرِهِ؟ قَالَتْ كُلُّ ذَلِكَ رُبَّمَا اغْتَسَلَ مِنْ أَوَّلِهِ وَرُبَّمَا اغْتَسَلَ مِنْ آخِرِهِ قُلْتُ الْحَمْدُ لِلَّهِ الَّذِي جَعَلَ فِي الْأَمْرِ سَعَةً  

"Sometimes he performed Ghusl at the beginning of the night and sometimes he performed Ghusl at the end." I said: "Praise be to Allah Who has made the matter flexible." (Using translation from Nasāʾī 222)  

عَنْ أَيُّ اللَّيْلِ كَانَ يَغْتَسِلُ رَسُولُ اللهِ ﷺ قَالَتْ رُبَّمَا اغْتَسَلَ أَوَّلَ اللَّيْلِ وَرُبَّمَا اغْتَسَلَ آخِرَهُ قُلْتُ الْحَمْدُ لِلَّهِ الَّذِي جَعَلَ فِي الْأَمْرِ سَعَةً