Genesis 1:9 (BSB)

And God said, “Let the waters under the sky be gathered into one place, so that the dry land may appear.” And it was so.

From Genesis 1. Also in the ESV.

Commentary on Genesis 1:9

• John Calvin (Reformed), Calvin's Commentaries on Genesis 1:9: 9. Let the waters... be gathered together This also is an illustrious miracle, that the waters by their departure have given a dwelling-place to men. For even philosophers allow that the natural position of the waters was to cover the whole earth, as Moses declares they did in the beginning; first, because being an element, it must be circular, and because this element is heavier...
• Matthew Henry (Presbyterian), Matthew Henry's Complete Commentary on Genesis 1:9-13: The third day's work is related in these verses - the forming of the sea and the dry land, and the making of the earth fruitful. Hitherto the power of the Creator had been exerted and employed about the upper part of the visible word; the light of heaven was kindled, and the firmament of heaven fixed: but now he descends to this lower world...
• John Gill (Reformed Baptist), Exposition of the Old and New Testaments on Genesis 1:9: And God said, let the waters under the heaven be gathered together unto one place,.... Which are before called the waters under the firmament; and which were either on the surface of the earth, or in the bowels of it, or mixed with it, which by the compressure of the expanse or air were separated from it and these, by apertures and channels made, were...
• Jamieson-Fausset-Brown (Reformed), Commentary Critical and Explanatory on the Whole Bible on Genesis 1:9-13: THIRD DAY. (Gen 1:9-13) let the waters under the heaven be gathered together unto one place--The world was to be rendered a terraqueous globe, and this was effected by a volcanic convulsion on its surface, the upheaving of some parts, the sinking of others, and the formation of vast hollows, into which the waters impetuously rushed, as is graphically described (Psa 104:6-9) [HITCHCOCK].