Sunan an-Nasa'i, Book 4, Hadith 13 (In-Book) ⓘ
It was narrated that Maimunah said: "I put some water out for the Messenger of Allah, then I concealed him" - and she mentioned how he performed Ghusl, then she said: "Then I brought him a cloth (a towel) but he did not want it."
أَخْبَرَنَا قُتَيْبَةُ، قَالَ حَدَّثَنَا عَبِيدَةُ، عَنِ الأَعْمَشِ، عَنْ سَالِمٍ، عَنْ كُرَيْبٍ، عَنِ ابْنِ عَبَّاسٍ، عَنْ مَيْمُونَةَ، قَالَتْ وَضَعْتُ لِرَسُولِ اللَّهِ صلى الله عليه وسلم مَاءً - قَالَتْ - فَسَتَرْتُهُ فَذَكَرَتِ الْغُسْلَ قَالَتْ ثُمَّ أَتَيْتُهُ بِخِرْقَةٍ فَلَمْ يُرِدْهَا .
also referenced under: Hadith 408 (Reference) & Volume 1, Book 4, Hadith 408 (DarusSalam)