"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