﴿ قَالُوا۟ بَلَىٰ قَدْ جَآءَنَا نَذِيرٌۭ فَكَذَّبْنَا وَقُلْنَا مَا نَزَّلَ ٱللَّهُ مِن شَىْءٍ إِنْ أَنتُمْ إِلَّا فِى ضَلَٰلٍۢ كَبِيرٍۢ ﴾

“They will reply: "Yea, a warner did indeed come unto us, but we gave him the lie and said, 'Never has God sent down anything [by way of revelation]! You [self-styled warners] are but lost in a great delusion!"'”

Please check ayah 67:11 for complete tafsir.