We don't have a full "inventory" of what Paul said, his letters address specific issues with various "churches".
Acts records some of Paul' statements:
Acts 20:21 Testifying both to the Jews, and also to the Greeks, repentance toward God, and faith toward our Lord Jesus Christ.
Acts 26:20 But showed first unto them of Damascus, and at Jerusalem, and throughout all the coasts of Judaea, and then to the Gentiles, that they should repent and turn to God, and do works meet for repentance.
Rom 2:4 Or despisest thou the riches of his goodness and forbearance and longsuffering; not knowing that the goodness of God leadeth thee to repentance?
2 Cor 7:10 For godly sorrow worketh repentance to salvation not to be repented of: but the sorrow of the world worketh death.
2 Tim 2:25 In meekness instructing those that oppose themselves; if God peradventure will give them repentance to the acknowledging of the truth;
Case dismythed.