Sunan Ibn Majah, Book 1, Hadith 280 (In-Book) ⓘ
It was narrated that 'Aishah said: "The Messenger of Allah used to perform ablution with a Mudd (of water) and bath with a Sa'."
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا يَزِيدُ بْنُ هَارُونَ، عَنْ هَمَّامٍ، عَنْ قَتَادَةَ، عَنْ صَفِيَّةَ بِنْتِ شَيْبَةَ، عَنْ عَائِشَةَ، قَالَتْ كَانَ رَسُولُ اللَّهِ ـ صلى الله عليه وسلم ـ يَتَوَضَّأُ بِالْمُدِّ وَيَغْتَسِلُ بِالصَّاعِ .
also referenced under: Hadith 268 (Reference) & Volume 1, Book 1, Hadith 268 (DarusSalam)