Narrated Aishah, Ummul Muminin: The Prophet ﷺ used to wash himself with a sa' (of water) and perform ablution with a mudd (of water). Abu Dawud said: This tradition has also been narrated by Aban on the authority of Qatadah. In this version he said: "I herd safiyyah. "
Hadith Referenceسنن ابي داود / كتاب الطهارة / 92
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح, رواه البيهقي (1/ 195) من حديث ابان بن يزيد العطار عن قتادة، وقتادة صرح بالسماع به
1؎: One sa’ (ṣā‘) is equivalent to four mudd, and one mudd is approximately six hundred and twenty-five (625) grams. Based on this calculation, a sa’ (ṣā‘) is approximately two kilograms and five hundred grams.