It is written; viz. in Isaiah 6:9, Isaiah 29:10. The spirit of slumber; the word signifieth, such a dead sleep, as those have, who are pricked or stung with venomous beasts, out of which they hardly or never awake. Unto this day: q.d. So it was of old, and so it is still. Or else these words (the former being included in a parenthesis) may be joined with the last words of the foregoing verse, thus, the rest were blinded unto this day.
Related Commentaries of Romans 11:8
Romans 11:8
8 (According as it is written, God hath given them the spirit of slumber,b eyes that they should not see, and ears that they should not hear;) unto this day.