1 Chronicles 14:8

This narrative of David's triumph over the Philistines is much the same with that, Sa2 5:17, etc. 1. Let the attack which the Philistines made upon David forbid us to be secure in any settlement or advancement, and engage us to expect molestation in this world. When we are most easy something or other may come to be a terror or vexation to us. Christ's kingdom will thus be insulted by the serpent's seed, especially when it makes any advances. 2. Let David's enquiry of God, once and again, upon occasion of the Philistines' invading him, direct us in all our ways to acknowledge God - in distress to fly to him, when we are wronged to appeal to him, and, when we know not what to do, to ask counsel at his oracles, to put ourselves under his direction, and to beg of him to show us the right way. 3. Let David's success encourage us to resist our spiritual enemies, in observance of divine directions and dependence on divine strength. Resist the devil, and he shall flee as the Philistines did before David. 4. Let the sound of the going in the tops of the mulberry trees direct us to attend God's motions both in his providence and in the influences of his Spirit. When we perceive God to go before us let us gird up our loins, gird on our armour, and follow him. 5.

— Matthew Henry's Concise Commentary (public domain)

HIS VICTORIES OVER THE PHILISTINES. (Ch1 14:8-17) all the Philistines went up to seek David--in the hope of accomplishing his ruin (for so the phrase is used, Sa1 23:15; Sa1 24:2-3) before his throne was consolidated. Their hostility arose, both from a belief that his patriotism would lead him, ere long, to wipe out the national dishonor at Gilboa, and by fear, that in any invasion of their country, his thorough knowledge of their weak points would give him superior advantages. They resolved, therefore, to surprise and crush him before he was fairly seated on his throne.

— Jamieson-Fausset-Brown Commentary (public domain)