I Timothy 4:13:

“Till I come, give attendance to reading, to exhortation, to doctrine.”

Jeremiah 30:2:

“Thus speaketh the LORD God of Israel, saying, Write thee all the words that I have spoken unto thee in a book.”

I Timothy 1:3:

“As I besought thee to abide still at Ephesus, when I went into Macedonia, that thou mightest charge some that they teach no other doctrine,”

I Timothy 4:16:

“Take heed unto thyself, and unto the doctrine; continue in them: for in doing this thou shalt both save thyself, and them that hear thee.”