Romans 11:10

Let their eyes become [spiritually] dim so they cannot see, and may their backs always bend [i.e., under heavy burdens]."

Romans 1:21

Now they knew who God was, but they did not honor Him as God or thank Him [for their blessings]. Instead they engaged in their useless speculations and their foolish minds were filled with [spiritual] darkness.

Romans 11:8

as it has been written [Isa. 19:10], "God gave them a spirit of numbness [i.e., they developed a spiritual insensitivity to God and His word]. [He gave them] eyes to see with [but they would not look], and ears to hear with [but they did not listen]. And they still have this spirit."

Ephesians 4:18

Their understanding [of spiritual things] is darkened and excluded from the [spiritual] life that God gives, because of the ignorance in their minds and the stubbornness in their hearts.

2 Peter 2:4

For if God did not spare sinning angels, but cast them in chains, into deep, dark dungeons to await judgment;

2 Peter 2:17

Such people are like springs that give no water and clouds driven by the winds. [Only] the blackest darkness awaits them.

Jude 1:6

And angels, who did not remain within [the bounds of] their proper authority, but left their own realm, God has kept in perpetual bondage, under [thick] darkness, awaiting judgment on the Great Day [when they will be punished].

Jude 1:13

[They are like] raging ocean waves, whose shameful actions bubble up like foam. [They are like] shooting stars [whose light quickly goes out], for whom total darkness has been reserved forever.

Treasury of Scripture Knowledge

Summary

Let their eyes be darkened, that they may not see, and bow down their back alway.

General references

Bible References

Their eyes

Romans 11:8
as it has been written [Isa. 19:10], "God gave them a spirit of numbness [i.e., they developed a spiritual insensitivity to God and His word]. [He gave them] eyes to see with [but they would not look], and ears to hear with [but they did not listen]. And they still have this spirit."
Romans 1:21
Now they knew who God was, but they did not honor Him as God or thank Him [for their blessings]. Instead they engaged in their useless speculations and their foolish minds were filled with [spiritual] darkness.
Ephesians 4:18
Their understanding [of spiritual things] is darkened and excluded from the [spiritual] life that God gives, because of the ignorance in their minds and the stubbornness in their hearts.
2 Peter 2:4
For if God did not spare sinning angels, but cast them in chains, into deep, dark dungeons to await judgment;
Jude 1:6
And angels, who did not remain within [the bounds of] their proper authority, but left their own realm, God has kept in perpetual bondage, under [thick] darkness, awaiting judgment on the Great Day [when they will be punished].

General references

John 8:27
The people [who heard this] did not understand that Jesus was speaking to them about the Father.