'Perfect' in the Bible

All these being men of war, who could order the battle array, came with a perfect heart to Hebron, to make David king over all Israel: and all the rest also of Israel were of one heart to make David king.

You, Solomon my son, know the God of your father, and serve him with a perfect heart and with a willing mind; for Yahweh searches all hearts, and understands all the imaginations of the thoughts. If you seek him, he will be found by you; but if you forsake him, he will cast you off forever.

Then the people rejoiced, because they offered willingly, because with a perfect heart they offered willingly to Yahweh: and David the king also rejoiced with great joy.

and give to Solomon my son a perfect heart, to keep your commandments, your testimonies, and your statutes, and to do all these things, and to build the palace, for which I have made provision."