And the Lord said unto Moses, go, get thee down,.... In De 9:12 it is added, "quickly", and so the Septuagint version here: this was said after the Lord had finished his discourse with him, and had given him the two tables of stone, and he was about to depart, but the above affair happening he hastens his departure; indeed the idolatry began the day before, and he could have acquainted him with it, if it had been his pleasure, but he suffered the people to go the greatest length before a stop was put to their impiety:for thy people which thou broughtest out of the land of Egypt have corrupted themselves; their works, as the Targum of Jonathan supplies it, their ways and their manners; their minds, the imaginations of their hearts, were first corrupted, and this led on to a corruption of actions, by which they corrupted and defiled themselves yet more and more, and made themselves abominable in the sight of God, as corrupt persons and things must needs be; and what can be a greater corruption and abomination than idolatry?
the Lord calls these people not his people, being displeased with them, though they had been, and were, and still continued; for, notwithstanding this idolatry, he did not cast them off from being his people, or write a "Loammi" on them; but he calls them Moses's people, as having broken the law delivered to them by him, they had promised to obey, and so were liable to the condemnation and curse of it; and because they had been committed to his care and charge, and he had been the instrument of their deliverance, and therefore it was great ingratitude to him to act the part they had done, as well as impiety to God; wherefore, though it was the Lord that brought them out of Egypt, it is ascribed to Moses as the instrument, to make the evil appear the greater.