Deuteronomy 28:23

23 And thou shalt have over thine head a sky of brass, and the earth under thee shall be iron.

Deuteronomy 28:23 Meaning and Commentary

Deuteronomy 28:23

And the heaven that [is] over thy head shall be brass
Or like brass, not for its clearness, brightness, and splendour, or for its being spread out like a molten looking glass which was of brass, ( Job 37:18 ) ; but for its dryness and hardness, no moisture being in it, or passing through it; no showers of rain nor dew being let down from it:

and the earth that is under thee [shall be] iron;
or like iron, hard and impenetrable, into which the plough and spade will not enter; nor anything spring out of it, for want of rain and dew to moisten and soften it. The same is said in ( Leviticus 26:19 ) ; only there is an inversion of the figures; there the heaven is said to be as iron, and the earth like brass, but signify the same thing.

Deuteronomy 28:23 In-Context

21 The Lord cause the pestilence to cleave to thee, until he shall have consumed thee off the land into which thou goest to inherit it.
22 The Lord smite thee with distress, and fever, and cold, and inflammation, and blighting, and paleness, and they shall pursue thee until they have destroyed thee.
23 And thou shalt have over thine head a sky of brass, and the earth under thee shall be iron.
24 The Lord thy God make the rain of thy land dust; and dust shall come down from heaven, until it shall have destroyed thee, and until it shall have quickly consumed thee.
25 The Lord give thee up for slaughter before thine enemies: thou shalt go out against them one way, and flee from their face seven ways; and thou shalt be a dispersion in all the kingdoms of the earth.

The Brenton translation of the Septuagint is in the public domain.