اِنَّ ذٰلِكَ لَحَقٌّ تَخَاصُمُ اَهْلِ النَّارِ ࣖ ( ص: ٦٤ )
Inna zaalika lahaqqun takhaasumu Ahlin Naar (Ṣād 38:64)
Indeed, that is truth [i.e., reality] – the quarreling of the people of the Fire. (Sad  : 64)
1 Mufti Taqi Usmani
That is going to happen definitely, that is, the mutual quarrel of the people of the Fire.