What does the quotation in Romans 11:8 say God gave Israel?

Les explains that when Paul writes 'it is written,' he is referring to the Old Testament, probably Isaiah. The quotation says God hath given them the spirit of slumber, eyes that they should not see, ears that they should not hear, even to this day. Les adds that Paul could write this today and it has not changed a bit; it was just as apropos when he wrote Romans. Then verse 9 goes back to the Psalms, quoting King David: 'let their table be made a snare, and a trap, and a stumbling block, and a recompense.' Les ties this to God's table, where Israel was feasting and receiving blessings, but that exalted position became a snare and caused them to fall. He also warns Gentiles not to take such blessings and grace for granted, because the day is coming when it will be taken from us.