Galatians 1:11

For I would like to clarify for you, brothers, the situation regarding the Gospel that I have preached: It did not originate from man.

1 Corinthians 2:9-10

But as it is written [Isa. 64:4], "The things which no eye saw or ear heard, and which did not [even] enter the mind of men, is what God has prepared for those who love Him."

1 Corinthians 11:23

For I received from the Lord what I also handed on to you: On the night the Lord Jesus was turned over [to the Jewish authorities] He took bread,

Romans 2:16

This will be done on the day when God judges the secrets of men's [hearts] through Christ Jesus, according to [the teaching of] my Gospel.

1 Corinthians 15:1-3

Now, brothers, I want to remind you of the good news which I preached to you. You received it; you are standing firm in it;

Galatians 1:1

[This letter is from] Paul, an apostle, (not from [the authority of] men, or through the [agency] of a man, but by [a direct commission from] Jesus Christ and God the Father, who raised Him from the dead).

Ephesians 3:3-8

[It is] that God's secret plan [i.e., revealed in the Gospel preached to Gentiles. See verse 6] was made known to me by way of a revelation. [See Acts 9:15; 22:21]. I have already written to you [about this] briefly [i.e., probably a reference to 1:9ff].

Treasury of Scripture Knowledge

Summary

But I certify you, brethren, that the gospel which was preached of me is not after man.

Bible References

That

Galatians 1:1
[This letter is from] Paul, an apostle, (not from [the authority of] men, or through the [agency] of a man, but by [a direct commission from] Jesus Christ and God the Father, who raised Him from the dead).
1 Corinthians 2:9
But as it is written [Isa. 64:4], "The things which no eye saw or ear heard, and which did not [even] enter the mind of men, is what God has prepared for those who love Him."
1 Corinthians 11:23
For I received from the Lord what I also handed on to you: On the night the Lord Jesus was turned over [to the Jewish authorities] He took bread,
1 Corinthians 15:1
Now, brothers, I want to remind you of the good news which I preached to you. You received it; you are standing firm in it;
Ephesians 3:3
[It is] that God's secret plan [i.e., revealed in the Gospel preached to Gentiles. See verse 6] was made known to me by way of a revelation. [See Acts 9:15; 22:21]. I have already written to you [about this] briefly [i.e., probably a reference to 1:9ff].