'Doctrines' in the Bible

But in vain they do worship me, teaching for doctrines the commandments of men.

Howbeit in vain do they worship me, teaching for doctrines the commandments of men.

Which all are to perish with the using;) after the commandments and doctrines of men?

Now the Spirit speaketh expressly, that in the latter times some shall depart from the faith, giving heed to seducing spirits, and doctrines of devils;

Be not carried about with divers and strange doctrines. For it is a good thing that the heart be established with grace; not with meats, which have not profited them that have been occupied therein.