'Give Heed' in the Bible

nor to give heed to fables and endless genealogies, which present questions, rather than the economy of God which is in faith:

If any one teaches another doctrine, and does not give heed to the sound words which belonged to our Lord Jesus Christ, and to the doctrine which is according to godliness;

Therefore it behooves us the more earnestly to give heed to the things which we have heard, lest at some time we may leak out.