'Take Heed' in the Bible

Only Yahweh give thee discretion and understanding, and give thee charge over Israel, - so that thou take heed unto the law of Yahweh thy God.

Then, shalt thou prosper, if thou take heed to do the statutes and the regulations, which Yahweh commanded Moses, concerning Israel, - be strong and bold, thou mayst not be in fear, nor be dismayed.

Take heed now; for the LORD hath chosen thee to build an house for the sanctuary: be strong, and do it.