Caravaggio, Saint Jerome Writing (c. 1605), Galleria Borghese. Public domain.
2 verses in the King James Version. Word study for “doctrine” →
But God be thanked, that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you.
Now I beseech you, brethren, mark them which cause divisions and offences contrary to the doctrine which ye have learned; and avoid them.