23:68
أَ فَ لَمْ يَدَّبَّرُ وا۟ ٱلْ قَوْلَ أَمْ جَآءَ هُم مَّا لَمْ يَأْتِ ءَابَآءَ هُمُ ٱلْ أَوَّلِينَ
Then have they not reflected over the Qur'an, or has there come to them that which had not come to their forefathers?
38:29
كِتَٰبٌ أَنزَلْ نَٰ هُ إِلَيْ كَ مُبَٰرَكٌ لِّ يَدَّبَّرُ وٓا۟ ءَايَٰتِ هِۦ وَ لِ يَتَذَكَّرَ أُو۟لُوا۟ ٱلْ أَلْبَٰبِ
[This is] a blessed Book which We have revealed to you, [O Muhammad], that they might reflect upon its verses and that those of understanding would be reminded.
47:24
أَ فَ لَا يَتَدَبَّرُ ونَ ٱلْ قُرْءَانَ أَمْ عَلَىٰ قُلُوبٍ أَقْفَالُ هَآ
Then do they not reflect upon the Qur'an, or are there locks upon [their] hearts?
4:82
أَ فَ لَا يَتَدَبَّرُ ونَ ٱلْ قُرْءَانَ وَ لَوْ كَانَ مِنْ عِندِ غَيْرِ ٱللَّهِ لَ وَجَدُ وا۟ فِي هِ ٱخْتِلَٰفًا كَثِيرًا
Then do they not reflect upon the Qur'an? If it had been from [any] other than Allah, they would have found within it much contradiction.