Ominous Object Lessons, 1-16
4:1 “And you, son of man, take a brick and set it in front of you. Inscribe a city on it—Jerusalem. 4:2 Lay siege to it! Build siege works against it. Erect a siege ramp against it! Post soldiers outside it and station battering rams around it. 4:3 Then for your part take an iron frying pan and set it up as an iron wall between you and the city. Set your face toward it. It is to be under siege; you are to besiege it. This is a sign for the house of Israel.
4:4 “Also for your part lie on your left side and place the iniquity of the house of Israel on it. For the number of days you lie on your side you will bear their iniquity. 4:5 I have determined that the number of the years of their iniquity are to be the number of days for you—390 days. So bear the iniquity of the house of Israel.
vv4-6 form the basis of a theory of prophecy in which a day represents a year. Although pre-dating the Puritans by several centuries, this belief was taken up by the Puritans – both postmillennialists and premillenialists:
‘Ezekiel is instructed to lie on his side for 390 days, then for 40 days, the first to represent 390 years, and the latter 40 years. While the Jewish rabbis had used this formula in their interpreting the book of Daniel, Protestants used it as a way of making sense of the days spoken of in the book of Revelation. As Toon observes, “For many Puritans this theory became an unquestioned premise.”38 Writers on prophecy used it to understand references to forty-two months in Revelation 11:2 and Revelation 13:5. Assuming that each month represents 30 days, the 42 months were interpreted as 1260 days (30 × 42), which was taken to mean 1260 years and seemed to be corroborated by Revelation 11:1-3.’
Lewis, D. (2021) A Short History of Christian Zionism.