5 Heb “you covered it.” The masculine suffix is problematic if the grammatically feminine noun “earth” is the antecedent. For this reason some emend the form to a feminine verb with feminine suffix, כִּסַּתָּה (kisattah, “[the watery deep] covered it [i.e., the earth]”), a reading assumed by the present translation.
6 Heb “stood.”
7 Verse 6 refers to the condition described in Gen 1:2 (note the use of the Hebrew term תְּהוֹם [téhom, “watery deep”] in both texts).

In other versions

He set the earth on its foundations,

so that it should never be moved.

You covered it with the deep as with a garment;

the waters stood above the mountains.

He set the earth on its foundations;

it can never be moved.

You covered it with the watery depths as with a garment;

the waters stood above the mountains.

He established the earth on its foundations;

it will never be shaken.

You covered it with the deep

as if it were a garment;

the water stood above the mountains.

You placed the world on its foundation

so it would never be moved.

You clothed the earth with floods of water,

water that covered even the mountains.

He established the earth on her foundations,

so that it will not be moved forever and ever.

You covered it with the deep as with a garment.

The waters stood above the mountains.

Who laid the foundations of the earth,

That it should not be removed for ever.

Thou coveredst it with the deep as with a garment:

The waters stood above the mountains.

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