Circumcised him because of the Jews, who could not yet be persuaded that the law of circumcision was abrogated. Paul, who became all things to all men, that he might save some, circumcised Timothy that he might not offend the Jewish converts, 1 Corinthians 9:22, but would not circumcise Titus, Galatians 2:3, lest that he should harden them, and offend the Gentiles. These indifferent things require a single eye, to the edifying of the church, and the salvation of souls. Timothy was uncircumcised, although his mother was a Jewess; for according to their Talmudists, the mother could not cause her child to be circumcised against the mind of the father.
Related Commentaries of Acts 16:3
Acts 16:3
3 Him would Paul have to go forth with him; and took and circumcised him because of the Jews which were in those quarters: for they knew all that his father was a Greek.