Kabbalah zu Schemot 21:4

{Then} what used to be a demon, [Which causes harm] turns around to be its angel {the aspect of} Metatron and turned {to become} Shadai, because the numerical value of Metatron is that of Shadai. Immediately there is fulfilled in it {i.e. the soul} "and she shall be his wife; he may not put her away all his days" (Deuteronomy 22:19). But if he does not repent, {the soul} is enslaved in him through the iniquities he committed and it shall be fulfilled in him, "the wife and her children shall be her master's" (Exodus 21:4), [meaning the soul will leave the person so his root] and it says of the demon which is its debtor, "and he shall go out by himself" (Ibid.), [Without a remedy]. That demon is like Moses' staff that turns from a staff into a snake and from a snake into a staff. So does this demon turn from a demon into an angel and from an angel into a demon, according to man's deeds.