'Teaching' in the Bible

By people who live on milk I mean those who are imperfectly acquainted with the teaching concerning righteousness.

or of teaching about ceremonial washings, the laying on of hands, the resurrection of the dead, and the last judgement.

Do not be drawn aside by all sorts of strange teaching; for it is well to have the heart made stedfast through God's grace, and not by special kinds of food, from which those who scrupulously attend to them have derived no benefit.