Surah Al-An'am 6:7

وَلَوْ نَزَّلْنَا عَلَيْكَ كِتَـٰبًا فِى قِرْطَاسٍ فَلَمَسُوهُ بِأَيْدِيهِمْ لَقَالَ ٱلَّذِينَ كَفَرُوٓا۟ إِنْ هَـٰذَآ إِلَّا سِحْرٌ مُّبِينٌ

And even if We had sent down to you, [O Muḥammad], a written scripture on a page and they touched it with their hands, the disbelievers would say, "This is not but obvious magic."

Translation: Saheeh International

Tafsir

And had We revealed to you a Scripture inscribed on parchment as they requested and had they then touched it with their hands — this is more powerful than saying ‘had they seen it with their eyes’ since it touch is more effective in eliminating doubt; …

Excerpt from Tafsir al-Jalalayn, commentary on 6:7, via Quran.com. The reader has the full commentary and 9 more tafsirs.