Galatians 2:3-4

Darby(i) 3 (but neither was Titus, who was with me, being a Greek, compelled to be circumcised;) 4 and [it was] on account of the false brethren brought in surreptitiously, who came in surreptitiously to spy out our liberty which we have in Christ Jesus, that they might bring us into bondage;