Tablet of Ahmad — Paragraph 13
Source (Arabic)
كَذَلِكَ حَالَتِ ٱلْظُّنُوْنُ بَيْنَهُمْ وَقُلُوْبِهِمْ وَتَمْنَعُهُمْ عَنْ سُبُلِ اللهِ ٱلْعَلِي ٱلْعَظِيمِ
Translation
Thus have their superstitions become veils between them and their own hearts and kept them from the path of God, the Exalted, the Great.