Behind the doors also and the posts hast thou set up thy remembrance. It has been usual to explain this of a removal from its proper place into an obscure position of the formulae which the Israelites were commanded in the Law to write on their doorposts and on their gates (Deuteronomy 6:9; Deuteronomy 11:20).
But, in the first place, there is no evidence that anciently these passages were understood literally, or that such inscriptions were ever set up; and secondly, as Mr. Cheyne remarks, they would have been more, rather than less, conspicuous in a new place.
Probably, therefore, the "memorial" (zikkaron) of this place is some idolatrous symbol or emblem newly adopted by the Jews, and made use of as a sort of talisman. Many commentators think that it was of a phallic character (see Ezekiel 16:17).
Discovered thyself; rather, uncovered thyself. Thou hast enlarged thy bed; i.e. multiplied thy idolatries. It is a feature of the idolatry of the time, that it was a mixture adopted from many quarters.
It included Baal and Ashtoreth-worship from Phoenicia, Moloch-worship from Moab and Ammos, worship of the Queen of Heaven from Syria, high-place worship from the Canaanites, and stone-worship from their own remote Mesopotamian ancestors.
And made thee a covenant with them; i.e. "a bargain for wages," that aid and protection should be rendered in return for worship and sacrifice. Where thou sawest it. The original is very obscure, but can scarcely have this meaning.
It is certainly a distinct clause, and may perhaps be best translated, "thou sawest indecency."