חבקוק ג:ט פירוש: רש״י

Your bow revealed itself Your might was revealed.

the oaths to the tribes The oaths that You swore to the tribes.

perpetual statement A statement that is to last forever. אֹמֶר is vowelized with a “pattah,” [meaning a “seggol”] and the accent is on the first syllable, making it a noun.