Galatians 4:11

4:11 I fear for you that my work for you may have been in vain.

Galatians 4:9

4:9 But now that you have come to know God (or rather to be known by God), how can you turn back again to the weak and worthless basic forces? Do you want to be enslaved to them all over again?

Galatians 2:2

2:2 I went there because of a revelation and presented to them the gospel that I preach among the Gentiles. But I did so only in a private meeting with the influential people, to make sure that I was not running – or had not run – in vain.

Galatians 2:14

2:14 But when I saw that they were not behaving consistently with the truth of the gospel, I said to Cephas in front of them all, “If you, although you are a Jew, live like a Gentile and not like a Jew, how can you try to force the Gentiles to live like Jews?”