'Heed' in the Bible

Neither give heed to fables and endless genealogies, which minister questions, rather than godly edifying which is in faith: so do.

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;

till I come, give heed to the reading, to the exhortation, to the teaching;

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.