en_tn/isa/43/19.md

Look

This word is used to draw attention to the important information that follows. Alternate translation: "Listen" or "Pay attention"

do you not know it?

Yahweh uses a question to teach the people of Israel. This rhetorical question can be translated as a statement. Alternate translation: "surely you have noticed it." (See: rc://en/ta/man/jit/figs-rquestion)