Tafsir of Al-Insan 76:4

The Recompense of the Disbelievers and the Righteous Allah informs

إنا أعتدنا للكافرين سﻼسﻼ وأغﻼﻻ وسعيرا

Verily, We have prepared for the disbelievers iron chains, iron collars, and Sa`ir. Allah informs of what he has waiting for those who disbelieve in Him from His creatures of chains, iron collars and Sa`ir. Sa`ir is the flame and fire of the Hell. This is as Allah says,

إذ اﻻغلل فى أعنقهم والسلسل يسحبون

فى الحميم ثم فى النار يسجرون

When iron collars will be rounded over their necks, and the chains, they shall be dragged along, in the boiling water, then they will be burned in the Fire. (40:71,72) After mentioning the blazing Fire He has prepared for these wretched people, Allah goes on to say,

إن اﻻبرار يشربون من كٲس كان مزاجها كافورا