1 Corinthians 9:19, 22
1 Corinthians 9:19 NASB1995
For though I am free from all men, I have made myself a slave to all, so that I may win more.
1 Corinthians 9:22 NASB1995
To the weak I became weak, that I might win the weak; I have become all things to all men, so that I may by all means save some.