Musnad Ahmad 31:253

Yahya ibn Ghaylan narrated to us, Rashdin narrated to us, he said: Amr ibn al-Harith narrated to me, from Ibn Shihab, from Abu Salamah ibn Abd al-Rahman, he narrated to him from Abu Sa’id al-Khudri, from the Messenger of Allah, may Allah bless him and grant him peace, that he said: "Water is from water."