بَلْ بَدَا لَهُم مَّا كَانُوا يُخْفُونَ مِن قَبْلُ ۖ وَلَوْ رُدُّوا لَعَادُوا لِمَا نُهُوا عَنْهُ وَإِنَّهُمْ لَكَاذِبُونَ (28)
(6:28) No! They will say this merely because the Truth which they had concealed will become obvious to them; *19 or else if they were sent back, they would still revert to what was forbidden to them. (So this plea of theirs would be a lie too) for they are just liars.
*19). At that moment such a statement on their part would not be indicative of either any true change of heart or of any genuinely revised judgement based on serious reflection and reasoning. It would rather be the result of direct observation of reality at a time when even the staunchest unbeliever would find it impossible to deny it.