# in the fifth

"in the fifth month"

# in the seventh month

The assumed knowledge is that the Jews mourned during a part of the seventh month of the Hebrew calendar because in this month the remaining Jews in Jerusalem fled to Egypt after the murder of Gedaliah, whom the king of Babylon appointed as governor over Judah. The seventh month is during the last part of September and the first part of October on Western calendars.

# for these seventy years

The assumed knowledge is that the people of Israel had been slaves in Babylon for 70 years.

# were you truly fasting for me?

"you were not really fasting for me."