Acts 9:29
He talked and debated with the Grecian Jews, but they tried to kill him.
Acts 15:1 Some men came down from Judea to Antioch and were teaching the brothers: "Unless you are circumcised, according to the custom taught by Moses, you cannot be saved." This brought Paul and Barnabas into sharp dispute and debate with them. So Paul and Barnabas were appointed, along with some other believers, to go up to Jerusalem to see the apostles and elders about this question.
Acts 18:28
For he vigorously refuted the Jews in public debate, proving from the Scriptures that Jesus was the Christ.
Acts 19:8-9 Paul entered the synagogue and spoke boldly there for three months, arguing persuasively about the kingdom of God. But some of them became obstinate: they refused to believe and publicly maligned the Way. So Paul left them.
2 Corinthians 10:5 We demolish arguments and every pretension that sets itself up against the knowledge of God, and we take captive every thought to make it obedient to Christ.
Am I now trying to win the approval of men, or of God? Or am I trying to please men? If I were trying to please men, I would not be a servant of Christ. Galatians 1:10
Paul opposes Peter. See Galatians 2:11-21
Galatians 4:16 Have I now become your enemy by telling you the truth?
1 Timothy 1:3-4 As I urged you when I went into Macedonia, stay there in Ephesus so that you may command certain men not to teach false doctrines any longer nor to devote themselves to myths and endless genealogies. These promote controversies rather than God's work—which is by faith.
2 Timothy 4:2-4 Preach the Word; be prepared in season and out of season; correct, rebuke and encourage—with great patience and careful instruction. For the time will come when men will not put up with sound doctrine. Instead, to suit their own desires, they will gather around them a great number of teachers to say what their itching ears want to hear. They will turn their ears away from the truth and turn aside to myths.
Titus 1:9 He must hold firmly to the trustworthy message as it has been taught, so that he can encourage others by sound doctrine and refute those who oppose it.
Titus 1:13 This saying is true. Therefore rebuke them sharply, so that they will be sound in the faith
Jude 3 Dear friends, although I was very eager to write to you about the salvation we share, I felt I had to write and urge you to contend for the faith that was once for all entrusted to the saints.