1 Chronicles 28:9 - Matthew Poole's English Annotations on the Holy Bible

Know thou the God; know him, so as to love him and serve him, as it follows; for words of knowledge in Scripture use commonly imply affection and practice: or acknowledge him as thy God, by loving and obeying him; for otherwise Solomon did already know God, having doubtless been very well instructed in the knowledge of God's nature and law. The Lord searcheth all hearts, and understandeth all the imaginations of the thoughts: if thou dost only put on a profession of religion, to please me and secure thy hopes of the kingdom; or if thy obedience to God be insincere and with grudging; thou mayst indeed deceive me, but thou canst not deceive him, for he searcheth thy inward thoughts, and the motions of thy heart. If thou forsake him; if when I am dead and gone, and thou art perfectly at thy own dispose, thou shalt cast off that religion and fear of God of which thou now makest profession, and shalt continue to do so without true repentance for thine errors. He will cast thee off for ever; notwithstanding all his promises made to me and to my seed, and that great honour and favour which he hath showed to thee, with which possibly thou mayst flatter thyself.