2,300 evenings and mornings

"Two thousand three hundred evenings and mornings." Here "evenings and mornings" is a merism that refers to everything in between, which means full days. Alternate translation: "2,300 sunsets and sunrises" or "2,300 days" (See: rc://en/ta/man/translate/translate-numbers and rc://en/ta/man/translate/figs-merism)

the sanctuary will be put right

"the temple will be purified and set in order again"