1 Corinthians 9:20

20 aTo the Jews I became as a Jew, in order to win Jews. To those under the law I became as one under the law (though not being myself under the law) that I might win those under the law.

Galatians 2:12

12For before certain men came from James, bhe was eating with the Gentiles; but when they came he drew back and separated himself, fearing cthe circumcision party.
Or  fearing those of the circumcision
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