خِتَامُهُ مِسْكٌSealed with musk,"This means it will be mixed with musk."Al-`Awfi reported from Ibn Abbas that he said,"Allah will make the wine have a pleasant aroma for them, so the last thing that He will place in it will be musk. Thus, it will be sealed with musk."Qatadah and Ad-Dahhak both said the same.Then Allah says,وَفِي ذَلِكَ فَلْيَتَنَافَسِ الْمُتَنَافِسُونَand for this let (all) those strive who want to strive.meaning, for a situation like this, let the boasters boast, compete, and strive to gain more. Let the competitors compete and race toward the likes of this.This is similar to Allah's statement,لِمِثْلِ هَـذَا فَلْيَعْمَلِ الْعَـمِلُونَFor the like of this let the workers work. (37:61)Allah then says,وَمِزَاجُهُ مِن تَسْنِيمٍ