Charles Spurgeon Commentary 1 Chronicles 28:9

"And thou, Solomon my son, know thou the God of thy father, and serve him with a perfect heart and with a willing mind; for Jehovah searcheth all hearts, and understandeth all the imaginations of the thoughts: if thou seek him, he will be found of thee; but if thou forsake him, he will cast thee off for ever." — 1 Chronicles 28:9 (ASV)

And you, Solomon my son, know the God of your father,

God is very dear to us; but perhaps under no aspect is he more tenderly near us than as the God of our father: My son, know the God of your father.

And serve him with a perfect heart and with a willing mind: for the LORD searcheth all hearts, and understandeth all the imaginations of the thoughts: if thou seek him, he wilt be found of thee; but if thou forsake him, he will cast thee off for ever.

What a covenant this was under which Solomon stood! Alas! he was not as true to God as he should have been; and though we hope he was not cast away for ever, yet under his rule Israel began to decay, and he pierced himself through with many sorrows in his latter days.