furnish thyself - literally, “make for thyself vessels” (namely, to contain food and other necessaries for the journey) for captivity.
daughter - so in Jer 46:11.
dwelling in Egypt - that is, the inhabitants of Egypt, the Egyptians, represented as the daughter of Egypt (Jer 48:18; 2Ki 19:21). “Dwelling” implies that they thought themselves to be securely fixed in their habitations beyond the reach of invasion.