'Under Every Green Tree' in the Bible

For long ago you broke your yoke and tore up your bonds; and you said, I will not transgress, when on every high hill and under every green tree you lay down like a harlot.

Jehovah also said to me in the days of Josiah the king, Have you seen that which backsliding Israel has done? She has gone up on every high mountain and under every green tree, and has fornicated there.

Only acknowledge your iniquity, that you have sinned against Jehovah your God and have scattered your ways to the strangers under every green tree, and you have not obeyed My voice, says Jehovah.