Charles Ellicott Commentary Jeremiah 17:10

"I, Jehovah, search the mind, I try the heart, even to give every man according to his ways, according to the fruit of his doings." — Jeremiah 17:10 (ASV)

According to his ways.—The Hebrew word is in the singular, his way, and the interpolated conjunction “and” is better omitted, so the last words serve as an explanation of what is meant by it. Jehovah, who searches the heart, answers the question: who can know it? He does know and will, in the end, judge with a perfectly righteous judgment. People should live as in the presence of One to whom all hearts are open.