And David behaved himself wisely in all his ways,.... Both in the court and in the camp, in whatsoever service he was employed; or "prospered" (u), as the word also signifies; for, generally speaking, those that behave wisely succeed well; in this he was a type of Christ, Isaiah 52:13; the reason of it follows:

and the Lord was with him; from whom he had his wisdom and success; the Targum is,"the Word of the Lord was for his help.''

(u) "prospere admodum res gerebat", Vatablus; "secundabatur", Junius & Tremellius, Piscator; so the Targum and Jarchi.

As chief commander over thousand, he went out and in before the people, i.e., he carried out military enterprises, and that so wisely and prosperously, that the blessing of the Lord rested upon all he did. But these successes on David's part increased Saul's fear of him, whereas all Israel and Judah came to love him as their leader. David's success in all that he took in hand compelled Saul to promote him; and his standing with the people increased with his promotion. But as the Spirit of God had departed from Saul, this only filled him more and more with dread of David as his rival. As the hand of the Lord was visibly displayed in David's success, so, on the other hand, Saul's rejection by God was manifested in his increasing fear of David.

And David behaved himself wisely in all his ways; and the LORD was with him.

behaved...: or, prospered

18:12-30 For a long time David was kept in continual apprehension of falling by the hand of Saul, yet he persevered in meek and respectful behaviour towards his persecutor. How uncommon is such prudence and discretion, especially under insults and provocations! Let us inquire if we imitate this part of the exemplary character before us. Are we behaving wisely in all our ways? Is there no sinful omission, no rashness of spirit, nothing wrong in our conduct? Opposition and perverseness in others, will not excuse wrong tempers in us, but should increase our care, and attention to the duties of our station. Consider Him that endured contradiction of sinners against himself, lest ye be weary and faint in your minds, Heb 12:3. If David magnified the honour of being son-in-law to king Saul, how should we magnify the honour of being sons to the King of kings!