Yahweh continues speaking.
These two lines share similar meanings. Yahweh’s inactivity is described as quietness and stillness. (See: rc://en/ta/man/translate/figs-parallelism)
These two phrases mean basically the same thing and indicate that Yahweh has kept himself from acting. AT: “I have kept myself from doing anything” (See: rc://en/ta/man/translate/figs-doublet)
Yahweh’s activity as a shouting warrior is compared with a pregnant woman who cries from labor pains. This emphasizes sudden unavoidable action after a period of inactivity. (See: rc://en/ta/man/translate/figs-simile)
Yahweh uses this metaphorical language to describe his great power to conquer his enemies. (See: rc://en/ta/man/translate/figs-metaphor)
A marsh is an area of soft, wet land with pools of water.