21:99
لَوْ كَانَ هَـٰٓؤُلَآءِ ءَالِهَةً مَّا وَرَدُوهَا ۖ وَكُلٌّ فِيهَا خَـٰلِدُونَ
Had these [false deities] been [actual] gods, they would not have come to it, but all are eternal therein.
The Prophets
لَوْ كَانَ هَـٰٓؤُلَآءِ ءَالِهَةً مَّا وَرَدُوهَا ۖ وَكُلٌّ فِيهَا خَـٰلِدُونَ
Had these [false deities] been [actual] gods, they would not have come to it, but all are eternal therein.
Nearby ayahs help place verse 21:99 in sequence and meaning.
وَٱقْتَرَبَ ٱلْوَعْدُ ٱلْحَقُّ فَإِذَا هِىَ شَـٰخِصَةٌ أَبْصَـٰرُ ٱلَّذِينَ كَفَرُوا۟ يَـٰوَيْلَنَا قَدْ كُنَّا فِى غَفْلَةٍ مِّنْ هَـٰذَا بَلْ كُنَّا ظَـٰلِمِينَ
And [when] the true promise has approached; then suddenly the eyes of those who disbelieved will be staring [in horror, while they say], "O woe to us; we had been unmindful of this; rather, we were wrongdoers."
إِنَّكُمْ وَمَا تَعْبُدُونَ مِن دُونِ ٱللَّهِ حَصَبُ جَهَنَّمَ أَنتُمْ لَهَا وَٰرِدُونَ
Indeed, you [disbelievers] and what you worship other than Allah are the firewood of Hell. You will be coming to [enter] it.
لَهُمْ فِيهَا زَفِيرٌ وَهُمْ فِيهَا لَا يَسْمَعُونَ
For them therein is heavy sighing, and they therein will not hear.
إِنَّ ٱلَّذِينَ سَبَقَتْ لَهُم مِّنَّا ٱلْحُسْنَىٰٓ أُو۟لَـٰٓئِكَ عَنْهَا مُبْعَدُونَ
Indeed, those for whom the best [reward] has preceded from Us - they are from it far removed.