This speaks of being able to rest as if "rest" were an object that could be found. AT: "we are unable to rest" (See: [[rc://en/ta/man/translate/figs-metaphor]])
This phrase "given ourselves" is an idiom. AT: "We have made a treaty with Egypt and with Assyria so that we would have food to eat" or "We have surrendered to Egypt and to Assyria to have enough food to remain alive" (See: [[rc://en/ta/man/translate/figs-idiom]])
Here "iniquities" represents the punishment received because of their ancestors' sins. AT: "we bear the punishment for their sins" (See: [[rc://en/ta/man/translate/figs-metonymy]])