Matthew Poole and continuators on 1 Kings 3:14

14 And if thou wilt walk in my ways , to keep my statutes, and my commandments, as thy father David did walk, then I will lengthen thy days.

This caution God gives him, lest his great Wisdom should make him proud, or careless, or presumptuous, as if he were out of all danger; and to oblige him to more care and circumspection to avoid the snares and mischiefs to which so much prosperity and glory would probably expose him; and withal to justify himself in case he should afterwards alter the course of his Providence towards Solomon; and that, when men are surprized with Solomon's dreadful fall, they might know, it was no surprizal to God, but that he did foresee it, and would over-rule it to his own Glory one way or other.

Marginal references: Chap. 15. 5.