Or who shut up the sea with doors - This refers also to the act of the creation, and to the fact that God fixed limits to the raging of the ocean. The word "doors" is used here rather to denote gates, such as are made to shut up water in a dam. The Hebrew word properly refers, in the dual form which is used here דלתים delethiym), to "double doors," or to folding doors, and is also applied to the gates of a city; Deuteronomy 3:5; 1-Samuel 23:7; Isaiah 45:1. The idea is, that the floods were bursting forth from the abyss or the center of the earth, and were checked by placing gates or doors which restrained them. Whether this is designed to be a poetic or a real description of what took place at the creation, it is not easy to determine. Nothing forbids the idea that something like this may have occurred when the waters in the earth were pouring forth tumultuously, and when they were restrained by obstructions placed there by the hand of God, as if he had made gates through which they could pass only when he should open them. This supposition also would accord well with the account of the flood in Genesis 7:11, where it is said that "the fountains of the great deep were broken up," as if those flood-gates had been opened, or the obstructions which God had placed there had been suffered to be broken through, and the waters of their own accord flowed over the world. We know as yet too little of the interior of the earth, to ascertain whether this is to be understood as a literal description of what actually occurred.
When it brake forth, as if it had issued out of the womb - All the images here are taken from child-birth. The ocean is represented as being born, and then as invested with clouds and darkness as its covering and its swaddling-bands. The image is a bold one, and I do not know that it is any where else applied to the formation of the ocean.

Who shut up the sea with doors - Who gathered the waters together into one place, and fixed the sea its limits, so that it cannot overpass them to inundate the earth?
When it brake forth, as if it had issued out of the womb? - This is a very fine metaphor. The sea is represented as a newly born infant issuing from the womb of the void and formless chaos; and the delicate circumstance of the liquor amnii, which bursts out previously to the birth of the foetus, alluded to. The allusion to the birth of a child is carried on in the next verse.

Or who shut up the sea with doors,.... From the earth the transition is to the sea, according to the order of the creation; and this refers not to the state and case of the sea as at the flood, of which some interpret it, but as at its first creation; and it is throughout this account represented as an infant, and here first as in embryo, shut up in the bowels of the earth, where it was when first created with it, as an infant shut up in its mother's womb, and with the doors of it; see Job 3:10; the bowels of the earth being the storehouses where God first laid up the deep waters, Psalm 33:7; and when the chaos, the misshapen earth, was like a woman big with child;
when it brake forth out of the abyss, as the Targum, with force and violence, as Pharez broke out of his mother's womb; for which reason he had his name given, which signifies a breach, Genesis 38:29; so it follows,
as if it had issued out of the womb; as a child out of its mother's womb; so the sea burst forth and issued out of the bowels of the earth, and covered it all around, as in Psalm 104:6; and now it was that the Spirit of God moved upon the face of the waters, before they were drained off the earth; this was the first open visible production of the sea, and nay be called the birth of it; see Genesis 1:2. Something like this the Heathen philosopher Archelaus had a notion of, who says (g), the sea was shut up in hollow places, and was as it were strained through the earth.
(g) Laert. Vit. Philosoph. l. 2. p. 99.

doors--floodgates; these when opened caused the flood (Genesis 8:2); or else, the shores.
womb--of chaos. The bowels of the earth. Image from childbirth (Job 38:8-9; Ezekiel 32:2; Micah 4:10). Ocean at its birth was wrapped in clouds as its swaddling bands.

8 And who shut up the sea with doors,
When it broke through, issued from the womb,
9 When I put clouds round it as a garment,
And thick mist as its swaddling clothes,
10 And I broke for it my bound,
And set bars and doors,
11 And said: Hitherto come, and no further,
And here be thy proud waves stayed!?
The state of תהו ובהו was the first half, and the state of תהום the second half of the primeval condition of the forming earth. The question does not, however, refer to the תהום, in which the waters of the sky and the waters of the earth were as yet not separated, but, passing over this intermediate condition of the forming earth, to the sea, the waters of which God shut up as by means of a door and bolt, when, first enshrouded in thick mist (which has remained from that time one of its natural peculiarities), and again and again manifesting its individuality, it broke forth (גּיח of the foetus, as Psalm 22:10) from the bowels of the, as yet, chaotic earth. That the sea, in spite of the flatness of its banks, does not flow over the land, is a work of omnipotence which broke over it, i.e., restraining it, a fixed bound (חק as Job 26:10; Proverbs 8:29; Jeremiah 5:22, = גּבוּל, Psalm 104:9), viz., the steep and rugged walls of the basin of the sea, and which thereby established a firm barrier behind which it should be kept. Instead of וּפה, Joshua 18:8, Job 38:11 has the Chethib וּפא. חק is to be understood with ישׁית, and "one set" is equivalent to the passive (Ges. 137*): let a bound be set (comp. שׁת, Hosea 6:11, which is used directly so) against the proud rising of thy waves.

Doors - Who was it, that set bounds to the vast and raging ocean, and shut it up, as it were with doors within its proper place, that it might not overflow the earth? Break forth - From the womb or bowels of the earth, within which the waters were for the most part contained, and out of which they were by God's command brought forth into the channel which God had appointed for them.