Bible Verses About Quotations and Allusions: Romans 11:8, »God hath given them the spirit of slumber...«

He said, "Go and tell this people: 'Yes, you hear, but you don't understand. You certainly see, but you don't get the point!'

"Make the heart of this people [sluggish with] fat, stop up their ears, and shut their eyes. Otherwise, seeing with their eyes, and hearing with their ears, then understanding with their hearts, they might repent and be healed!"

For ADONAI has poured over you a spirit of lethargy; he has closed your eyes (that is, the prophets) and covered your heads (that is, the seers).

"Human being, you are living among a rebellious people. They have eyes that can see, but they don't take notice; and they have ears that can hear, but they don't pay attention; because they are a rebellious people.

just as the Tanakh says, “God has given them a spirit of dullness — eyes that do not see and ears that do not hear, right down to the present day.”