en_tn/isa/07/18.md

At that time

This refers to before the child knows to refuse the evil and choose the good, mentioned in Isaiah 7:13.

Yahweh will whistle

"Yahweh will call" or "Yahweh will summon"

for a fly from the distant streams of Egypt, and for a bee from the land of Assyria

AT: "for the armies of Egypt and Assyria, and their soldiers will be everywhere like flies and bees." (See: rc://en/ta/man/translate/figs-metaphor)