(Al-Muthwaffifeen) 83 : 27
وَمِزَاجُهُ مِنْ تَسْنِيمٍ

 Its mixture will be from “Thasneem.”

“Thasneem” is a spring that flows from above to below. It is told in verse 32: 17 that no soul knows what a delight of the eyes is kept hidden for the forerunners who will be seated near the Almighty Lord, as a reward for what they had been doing. See explanation 56: 10–26.