John Gill Commentary Jeremiah 22:5

"But if ye will not hear these words, I swear by myself, saith Jehovah, that this house shall become a desolation." — Jeremiah 22:5 (ASV)

But if you will not hear these words Will give no attention, and yield no obedience to them: I swear by myself, says the Lord ; and by a greater he cannot swear; and that is the reason why he swears by himself, (Hebrews 6:13) ; and as, when he swears to a promise, it shows the immutability of it, the certainty of its performance, and that it is irreversible, and never repented of, nor revoked; so it is when he swears to a threatening. The Targum is, ``by my word I swear:'' that this house shall become a desolation ; meaning not the temple, nor the city, but the king's palace.