It was narrated from 'Aishah that the Messenger of Allah (ﷺ) used to perform Ghusl with a Mudd and Ghusl with approximately a Sa'.
Sunan an-Nasa'i Book 2, Hadith 22
← Previous Hadith "I heard Anas bin Malik say: 'The Messenger of Allah (ﷺ) used to perform Wudu' with a Makkuk (cup) and Ghusl with five Makkuks (cups).'"

Sunan an-Nasa'i Book 2, Hadith 21 Next Hadith → "The Messenger of Allah (ﷺ) used to perform Ghusl with a Mudd and Ghusl with a Sa'."

Sunan an-Nasa'i Book 2, Hadith 23