1 Kings 14:9

but hast done evil above all that were before thee This must refer not only to the kings who had preceded Jeroboam, but to the cases of idolatry in the earlier days, e.g. of the Judges. There had been no such instance of sin in the lives of David or of Saul, and Solomon's transgression had been the building of temples and the setting up of images for his strange wives, who were already idolaters.

for thou hast gone R.V. - and thou hast gone". The conjunction is the simple copulative.

other gods So certain was the making of an image, even if it was to represent Jehovah, to lead to the introduction of false worship, that God speaks of it as already effected.

and hast cast me behind thy back An expression indicative of the extremest contempt. It is used Nehemiah 9:26 of the whole national sin which led to the captivity, and in Ezekiel 23:35, where the prophet is describing the apostasy of Aholibah.