Albert Barnes Commentary Jeremiah 3:13

"Only acknowledge thine iniquity, that thou hast transgressed against Jehovah thy God, and hast scattered thy ways to the strangers under every green tree, and ye have not obeyed my voice, saith Jehovah." — Jeremiah 3:13 (ASV)

Acknowledge – literally, “know your iniquity;” know that your doings are iniquitous.

Scattered your ways – Wandered in search of those idolatries which foreign nations practice.