Tafsir of Ar-Rahman 55:51

Then which of the blessings of your Lord will you both deny! Al-Hasan Al-Basri said that one of these springs is called Tasnim, and the other called As-Salsabil. Atiyah said that the water of one of these springs is from non-standing water and the other from wine that gives delight to those who drink it. Allah's statement,

فيهما من كل فاكهة زوجان