Matthew Poole and continuators on Jeremiah 17:5

5 ¶ Thus saith the LORD, Cursed be the man, that trusteth in man, and maketh flesh his arm, and whose heart departeth from the LORD .

It was the great sin of this people for which they are often taxed in Holy Writ, 2 Chron. 16.7. and 28.26, 20. Isa. 30.1, 2. and 31.1, 2. when any danger threatned them for their sins, to make leagues with, and flee to forreign idolatrous Nations to help and succour them, and to repose a confidence in them▪ and so boulster up themselves in their wicked and sinful courses promising themselves deliverance from the dangers that threatned them, by the power of their Confederates, and Allies. This sin the Prophet here reflecteth upon. That while their hearts departed from God they would yet incourage themselves, from the hoped for help of men: The Prophet from God declares that such are and shall be cursed, and mentioneth man, under the notion of Flesh, to shew his frailty, and impotency ▪ to help against the mighty power and wrath of God, withal shewing us. That God alone is the true object of our Faith and Confidence, as well for the things of this Life, as those of another Life, and that none whose heart departeth from God, can with any security look for any help from the Creature.