Romans 11:8

"According as it is written, God hath given them the spirit of slumber." Now whence came this blinding? He had indeed mentioned the causes of it before, and turned it all upon their own heads, to show that it was from their unseasonable obstinacy that they had to bear this. And now he speaks of it too. For when he says, "Eyes that they should not see, and ears that they should not hear," he is but finding fault with their contentious spirit. For when they had "eyes to see" the miracles, and were possessed of "ears to hear" that marvellous Teaching, they never used these as were fitting. And the "He gave," do not imagine to mean here an agency, but a permission only. But "slumber" is a name he here gives to the habit of soul inclinable to the worse, when incurably and unchangeably so. For in another passage David says, "that my glory may sing unto Thee, and I may not be put to slumber": that is, I may not alter, may not be changed. For as a man who is hushed to slumber in a state of pious fear would not easily be made to change his side; so too he that is slumbering in wickedness would not change with facility. For to be hushed to slumber here is nothing else but to be fixed and riveted to a thing. In pointing then to the incurable and unchangeable character of their spirit, he calls it "a spirit of slumber."