as the word of Yahweh commanded

Here "the word" represents Yahweh himself. AT: "as Yahweh commanded" (See: rc://en/ta/man/translate/figs-metonymy)

the brook Kerith

This is the name of a very small stream. See how you translated this in 1 Kings 17:2. (See: rc://en/ta/man/translate/translate-names)