en_tn_lite_do_not_use/jer/50/10.md

this is Yahweh's declaration

Yahweh speaks of himself by name to express the certainty of what he is declaring. See how you translated this in Jeremiah 1:8. AT: "this is what Yahweh declares" or "this is what I, Yahweh, declare" (See: rc://en/ta/man/translate/figs-123person)

Chaldea will become plunder

"They will plunder Chaldea"