'Every Green Tree' in the Bible

For of old thou hast broken thy yoke, and burst thy bands; and thou saidst, I will not serve. For upon every high hill, and under every green tree, thou bowest down, playing the harlot.

And Jehovah said unto me in the days of Josiah the king, Hast thou seen what backsliding Israel hath done? She hath gone up upon every high mountain and under every green tree, and there hath committed fornication.

Only acknowledge thine iniquity, that thou hast transgressed against Jehovah thy God, and hast turned thy ways hither and thither to the strangers under every green tree; and ye have not hearkened to my voice, saith Jehovah.