1 Kings 2:3
And keep the charge of the LORD thy God, to walk in his ways, to keep his statutes, and his commandments, and his judgments, and his testimonies, as it is written in the law of Moses, that thou mayest prosper in all that thou doest, and whithersoever thou turnest thyself:
This is David's dying and final charge to Solomon as the incoming king. He was to be strong and show himself a man, with courage and integrity in carrying out his responsibilities. Part of that charge was to govern wisely and to settle the affairs of the kingdom before David's death.
Keeping the charge of the Lord meant walking in His ways and keeping His statutes and His commandments and His judgments and His testimonies, as written in the law of Moses. The same obedience was to mark Solomon as a faithful, godly man in his rule. Faithful obedience was the condition for prospering in all that he did and whithersoever he turned himself, in his actions, paths, and undertakings. That prosperity depended on faithfully keeping God's charge.
The charge connected obedience with the continuance of God's promise concerning David's descendants on Israel's throne. They would remain on the throne of Israel if they walked before God in truth with all their heart and soul, truthfully and wholeheartedly. The prosperity, success, and standing of Israel among the nations depended greatly on the king's fidelity to God. In practical terms, Solomon would prosper in building the temple if he followed God's commands, and God's promise of wisdom to him was conditional on walking in righteousness and truth.
The charge remains binding on those who bear responsibility in God's work and on people in positions of trust today. As Solomon was tested, so God's people are tested during their time of probation. It applies personally as a call to take God's instruction to heart and to put away and reject wrongdoing. In that personal obedience, honest confession of sin is honorable rather than disgraceful.