Paul often speaks of doctrine:
Rom_6:17 But God be thanked that though you were slaves of sin, yet you obeyed from the heart that form of doctrine to which you were delivered.
Rom_16:17 Now I urge you, brethren, note those who cause divisions and offenses, contrary to the doctrine which you learned, and avoid them.
Eph_4:14 that we should no longer be children, tossed to and fro and carried about with every wind of doctrine, by the trickery of men, in the cunning craftiness of deceitful plotting,
1Ti_1:3 As I urged you when I went into Macedonia—remain in Ephesus that you may charge some that they teach no other doctrine,
1Ti_1:10 for fornicators, for sodomites, for kidnappers, for liars, for perjurers, and if there is any other thing that is contrary to sound doctrine,
1Ti_4:6 If you instruct the brethren in these things, you will be a good minister of Jesus Christ, nourished in the words of faith and of the good doctrine which you have carefully followed.
1Ti_4:13 Till I come, give attention to reading, to exhortation, to doctrine.
1Ti_4:16 Take heed to yourself and to the doctrine. Continue in them, for in doing this you will save both yourself and those who hear you.
1Ti_5:17 Let the elders who rule well be counted worthy of double honor, especially those who labor in the word and doctrine.
1Ti_6:1 Let as many bondservants as are under the yoke count their own masters worthy of all honor, so that the name of God and His doctrine may not be blasphemed.
1Ti_6:3 If anyone teaches otherwise and does not consent to wholesome words, even the words of our Lord Jesus Christ, and to the doctrine which accords with godliness,
2Ti_3:10 But you have carefully followed my doctrine, manner of life, purpose, faith, longsuffering, love, perseverance,
2Ti_3:16 All Scripture is given by inspiration of God, and is profitable for doctrine, for reproof, for correction, for instruction in righteousness,
2Ti_4:3 For the time will come when they will not endure sound doctrine, but according to their own desires, because they have itching ears, they will heap up for themselves teachers;