Ezekiel presents us with two prophesies one to the Northern tribes i.e. House of Israel and one southern House of Judah made up also of tribe of Benjamin. There are two distinction here 390 days for 390 years and 40 days for 40 years. The 390 days is easy, there are 390 years from the final prophet Malachi to the John the dipper (baptizer) The Church refers to this as the inter-testamental period of around 400 years. Ezekiel prophesy 390 refers to this period that lies to the future of the prophet beyond the Babylonian captivity and the return. The words 390 only appear in this prophet and no where else in the Hebraic text. No other references to say 390 = thus. It is beyond reasonable doubt that Malachi to John the Dipper was 390 years. As far as can be determined no other 390 years for 390 days fits the model.
The 40 days for 40 years is not as clear cut. The word forty (‘arba ‘iym) in the KJV 158 times and in the texts around 135 times. The term 40 years appears 45 times (KJV trans) 31 references predate Ezekiel and so has no answer for us as to when or where. Ezekiel has three references to 40 years. Ezekiel 29:11-13 and the references are not to the House of Judah yet to Egypt and the surrounding countries. See Ezekiel 29. So where are these 40 years?
Understanding the prophet Daniel is key to understanding these 40 years. It is also key to understand Messiah’s words, “this generation shall not pass...” A generation for the Hebraic world is around 40 years. In previous times, Abraham’s time a 100 years i.e. in the fourth generation. Daniel the prophet from Gabriel speaks on this wise, “until the anointed one governor sevens seven and sevens sixty and two...” In English 69 weeks of Shimitah years. (69x7) and thus perverted because the nations no very little about Divine Sabbaths. Simply put there is no break in the sequence of Divine Sabbaths, Seven days (weekly), Seven years (Shimitah), Fifty years (Jubilee the great reset) See Lev 25. It would be 69 of these from the edict until the appearing of the governor i.e. Christ the King of Zion.
It would be 62 of these, the sevens (Shi'mitah) sixty and two until Messiah is cut off (katath) fulfilling the prophesies of Isaiah’s suffering servant See Isa 49-55. Also it is written, “Christ must first suffer then enter His esteem (glory)” The time between the suffering and the esteem is 40 years. The prophets inquired as to this time but it was not divine and all the majors had died long before Daniel had spoken.
Ezekiel lays on His side for 40 days for the burden of Judah, yet what is this burden this iniquity? The murder of the Mashiach. Messiah speaks, “when you see the abomination and desolation of the prophets Daniel” This abomination is the murder of Messiah in the flesh. At Messiah’s time there was no nation of Israel per'se. The land was called the Land of Judah because the tribe of Judah dwelt there since the days of Jeroboam the King. The divided kingdoms. All modern notions of Israel must be disregarded that which is Jerusalem is in bondage with here children see Gal 4:25. She is the Great Whore that sits on many waters drunken with the blood of saints and prophets See Rev 11:18; Rev 16:6; Rev 18:20; Rev 18:24. Messiah speaks concerning them Matt 23:37: Luke 13:34: Matt 12:41-42; Matt 23:35. In 69AD that blood was required 40 years after the resurrection of Messiah.
Judah is charged by Peter as having assassinated the Messiah, “you by wicked hands have taken an slain” Repentance is commanded after is it spoken that this wicked deed was predestined and should Judah repent the times of refreshing will come. The times of refreshing are Zion answering to the prophet Isaiah (See Isa 2, Ezekiel 40-48, Jer 31 and Hebraic eschatology) They refused and were cut off 40 years after the resurrection of the Christ (69AD). The mystery of Israel spoken by Paul refers here. Yet a redeemer will come out of Zion turning back the iniquity of Jacob (future tense) however until such time the mystery of the body, the Gentile call is revealed. The mystery of Christ dependent upon no convent old or new, no law old or new no ordinances (ritual) but solely upon Divine clemency at the pleasure of His will. See Eph 1:1-9 and hence a Dispensation of Grace. The mystery of Israel and the Mystery of the Body are co-dependent one cannot be without the other. Many things hard to be understood and many wrest things written to their own destruction.