1 verse has
“covers”
in Edition Clear Qur'an by Talal Itani / Al-An'aam (The Cattle)
6:25Among them are those who listen to you; but We place covers over their hearts, to prevent them from understanding it, and heaviness in their ears. Even if they see every sign, they will not believe in it. Until, when they come to you, to argue with you, those who disbelieve will say, “These are nothing but myths of the ancients.”
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The Holy Quran · Al-Baqara (The Cow) · 2:274