1 Corinthians 9:20
To the Jews I am become like a Jew, that I may win Jews; to those under the Law, like one under the Law, though I am not under the Law, myself;
Acts 16:3
Now Paul, wishing that this man should accompany him on his journey, took him and circumcised him because of the local Jews, who all knew that his father was a Greek.
Acts 21:20-26
And they, when they heard it, glorified God, and said to him. "You see, brother, how many thousands there are among the Jews, of those who have believed, and they are all zealous for the Law.
Acts 17:2-3
and Paul, according to his usual custom, went in to them and, for three Sabbath Days, he reasoned with them out of the Scriptures,
Acts 18:18
And Paul after remaining in Corinth some time longer, took leave of the brothers, and sailed away to Syria, accompanied by Priscilla and Aquila. As Paul was under a vow, he had his head shaved at Cenchrea.
Romans 3:19
Now we know that whatever the Law says, it speaks to those who are under the Law; so that every mouth may be shut, and all the world may be brought under the judgment of God.
Romans 6:14-15
For sin shall not lord it over you; for you are not under the rule of law, but under the rule of grace.
Romans 11:14
if by any means I might "provoke to jealousy" my kinsmen, and save some among them.
Galatians 4:5
to redeem from captivity those under law, in order that we might receive our sonship.
Galatians 4:21
Tell me, you who wish to be subject to the Law, why do you not listen to the Law?
Galatians 5:18
But if you are habitually led by the Spirit you are not under law.