Genesis 1:6

6 And God saith, `Let an expanse be in the midst of the waters, and let it be separating between waters and waters.'

Genesis 1:6 In-Context

4 And God seeth the light that [it is] good, and God separateth between the light and the darkness,
5 and God calleth to the light `Day,' and to the darkness He hath called `Night;' and there is an evening, and there is a morning -- day one.
6 And God saith, `Let an expanse be in the midst of the waters, and let it be separating between waters and waters.'
7 And God maketh the expanse, and it separateth between the waters which [are] under the expanse, and the waters which [are] above the expanse: and it is so.
8 And God calleth to the expanse `Heavens;' and there is an evening, and there is a morning -- day second.
Young's Literal Translation is in the public domain.