Mishkat al-Masabih 3 Purification كتاب الطهارة 143

وَعَنْ أَنَسٍ قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يَتَوَضَّأُ بِالْمُدِّ وَيَغْتَسِلُ بِالصَّاعِ إِلَى خَمْسَةِ أَمْدَادٍ

Anas said that the Prophet used to perform ablution with a mudd of water and wash with a sa‘ up to five mudds . (Bukhari and Muslim.)