﴿ إِنَّا جَعَلْنَا فِىٓ أَعْنَٰقِهِمْ أَغْلَٰلًۭا فَهِىَ إِلَى ٱلْأَذْقَانِ فَهُم مُّقْمَحُونَ ﴾

“Behold, around their necks We have put shack­les, reaching up to their chins, so that their heads are forced up;”

Please check ayah 36:12 for complete tafsir.