Narrated Anas: The Prophet used to take a bath with one Sa` up to five Mudds (1 Sa` = [??] Mudds) of water and used to perform ablution with one Mudd of water.
Hadith Referenceصحيح البخاري / كتاب الوضوء / 201
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة
Narrated Anas bin Malik: The Prophet and one of his wives used to take a bath from a single pot of water. (Shu`ba added to Anas' Statement "After the Janaba").
Hadith Referenceصحيح البخاري / كتاب الغسل / 264
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة