Jeremiah 17:9-10

Wycliffe Bible

⁹ The heart of man is shrewd, and unsearchable; who shall know it? (Each person’s heart is depraved, and unknowable; who can understand it?)

¹⁰ I am the Lord seeking the heart, and proving the reins, either kidneys, and I give to each man after his way, and after the fruit of his findings. (I am the Lord searching the minds, and proving the hearts, and I give to each person after his own ways, and after the fruit of his own deeds.)