Musnad Abu Ya'la al-Mawsili 111:48

Narrated to us Surayj, narrated to us Ibrahim ibn Sulayman, from al-A’mash, from al-Hasan, from Ibn Abbas: That he said regarding His saying: "We will add to them punishment upon the punishment," he said: They are five rivers beneath the Throne. They are punished by some of them at night and by some of them during the day.