LXX Psalms 68:23
21 They gave me also gall for my food, and made me drink vinegar for my thirst. 22 Let their table before them be for a snare, and for a recompence, and for a stumbling-block. 23 Let their eyes be darkened that they should not see; and bow down their back continually. 24 Pour out thy wrath upon them, and let the fury of thine anger take hold on them. 25 Let their habitation be made desolate; and let there be no inhabitant in their tents:
Romans 11:10
8 as it is written, “God gave them a spirit of stupor, eyes that would not see and ears that would not hear, to this very day.” 9 And David says, “Let their table become a snare and trap, a stumbling block and a retribution for them; 10 let their eyes be darkened so that they may not see, and make their backs bend continually.” 11 I ask then, they did not stumble into an irrevocable fall, did they? Absolutely not! But by their transgression salvation has come to the Gentiles, to make Israel jealous. 12 Now if their transgression means riches for the world and their defeat means riches for the Gentiles, how much more will their full restoration bring?
Notes and References
"... As was the case in Romans 10:19-21, so also here each passage plays an important role in shaping Paul’s reading of the other. By means of Isaiah’s (“spirit of stupor”), Paul transmutes Moses’ lament that God has not yet granted Israel an understanding heart into the much stronger claim that God has, in fact, directly caused Israel’s spiritual insensibility. (The wording “eyes such as do not see ... ears such as do not hear” may reflect Paul’s desire to connect this citation with the words of “David” that follow in Romans 11:9-10 (compare Romans 11:10 / Psalm 68:24 LXX) And it is Deuteronomy’s insistence that their blindness persists “to the present day” that gives Paul interpretive leverage to read the description of Isaiah’s opponents in Isaiah 29:10 as a diagnosis of his contemporaries’ failure to believe the gospel ..."
Wagner, J. Ross "Moses and Isaiah In Concert: Paul's reading of Isaiah and Deuteronomy in the Letter to the Romans" in McGinnis, Claire Mathews, and Patricia K. Tull (eds.) "As Those Who Are Taught": The Interpretation of Isaiah from the LXX to the SBL (pp. 87-105) Society of Biblical Literature, 2006