قَالُوْا بَلْ لَّمْ تَكُوْنُوْا مُؤْمِنِيْنَۚ ( الصافات: ٢٩ )
Qaaloo bal lam takoonoo mu'mineen (aṣ-Ṣāffāt 37:29)
They [i.e., the oppressors] will say, "Rather, you [yourselves] were not believers, (As-Saffat  : 29)
1 Mufti Taqi Usmani
They (the chiefs) will say, “On the contrary, you yourselves were not believers.