דברי הימים א, פרק כ״ט, פסוק י״ז

Any material gift offered to God holds no independent value, as all wealth in the world already belongs to Him. The only true, original gift a person can offer of their own initiative is their inner will and the purity of their intentions [מלבי״ם, ביאור שטיינזלץ]. Understanding this reality, King David acknowledges that God actively tests and examines the human heart [מצודת ציון]. God looks into a person's deepest thoughts [מצודת דוד] to determine if they are internally divided, harboring two hearts—one leaning toward good and another toward evil [רש״י]. Ultimately, God does not desire silver or gold; He seeks an upright heart focused entirely on a single, pure goal, completely free from hidden agendas or outside motives [רש״י, מלבי״ם].

Against this backdrop, David confidently testifies about his own actions. He knows with absolute certainty that he directed his heart toward the good, giving his offering wholeheartedly and without any hidden intent [רש״י, מלבי״ם].

Turning his attention to the national leaders gathered before him, David reflects on their contributions. It is noted that had all the wealthy Israelites from every city been present, the total offering would have been even greater [רש״י]. Yet, as David considers those who are actually there, a clear distinction emerges between his self-awareness and his knowledge of others. While he intimately knows his own internal motives, only God can truly see the hidden depths of another person's heart [רש״י, רד״ק, מלבי״ם]. Nevertheless, David observes the visible joy with which the leaders bring their offerings. From this outward display of happiness, he concludes that their generosity must also stem from a genuine desire and an upright heart, mirroring his own pure intentions [מצודת דוד, רד״ק, מלבי״ם].