69:49
وَإِنَّا لَنَعْلَمُ أَنَّ مِنكُم مُّكَذِّبِينَ ٤٩
Saheeh International
And indeed, We know that among you are deniers.
Tafsir of "Ibn Kathir" (English)
And verily, We know that there are some among you that deny (this Qur'an).meaning, with this explanation and clarification, there will still be among you those who reject the Qur'an.Then Allah says,وَإِنَّهُ لَحَسْرَةٌ عَلَى الْكَافِرِينَ