The Book of Water
2/13. Chapter:
How Much Water Is Sufficient For A Person To Use For Wudu' And Ghusl
Sunan an-Nasai
أَخْبَرَنَا هَارُونُ بْنُ إِسْحَاقَ الْكُوفِيُّ، قَالَ حَدَّثَنَا عَبْدَةُ، - يَعْنِي ابْنَ سُلَيْمَانَ - عَنْ سَعِيدٍ، عَنْ قَتَادَةَ، عَنْ صَفِيَّةَ بِنْتِ شَيْبَةَ، عَنْ عَائِشَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم كَانَ يَتَوَضَّأُ بِمُدٍّ وَيَغْتَسِلُ بِنَحْوِ الصَّاعِ .
It was narrated from 'Aishah that the Messenger of Allah (ﷺ) used to perform Ghusl with a Mudd and Ghusl with approximately a Sa'.
Reference : Sunan an-Nasa'i 346In-book reference : Book 2, Hadith 22English translation : Vol. 1, Book 2, Hadith 347