"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.'"
Sunan an-Nasa'i Book 1, Hadith 224
← Previous Hadith "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."

Sunan an-Nasa'i Book 1, Hadith 223 Next Hadith → "I used to serve the Messenger of Allah (ﷺ) and when he wanted to perform Ghusl he said: 'Turn your back.' So I turned my back to him and concealed him."

Sunan an-Nasa'i Book 1, Hadith 225