Acts 21:24

these take, and perform the rites of purification with them, contributing to the expence of having their heads shav'd: this will convince them, what has been reported of you, is all groundless, and that you stick to the observances of the law.

Romans 11:7-10

"What then, hath not Israel obtained what he sought for?" no, but the chosen remnant have obtained it, and the rest are obdurate to this day,

Romans 11:25

I would not, brethren, have you ignorant of this secret, (for fear you should presume too much on your selves) that blindness has fallen upon a part of Israel, until the time when the Gentiles shall be fully come in.

2 Corinthians 4:3-4

but if our gospel be obscure, it is so only to those who are lost:

Treasury of Scripture Knowledge

Summary

And thou shalt grope at noonday, as the blind gropeth in darkness, and thou shalt not prosper in thy ways: and thou shalt be only oppressed and spoiled evermore, and no man shall save thee.

Bible References

Grope

Romans 11:7
"What then, hath not Israel obtained what he sought for?" no, but the chosen remnant have obtained it, and the rest are obdurate to this day,
2 Corinthians 4:3
but if our gospel be obscure, it is so only to those who are lost: