'Heed' in the Bible

nor to give heed to fables and endless genealogies, that cause questions rather than the building up of God that is in faith: --

And the Spirit expressly speaketh, that in latter times shall certain fall away from the faith, giving heed to seducing spirits and teachings of demons,

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

take heed to thyself, and to the teaching; remain in them, for this thing doing, both thyself thou shalt save, and those hearing thee.