Jeremiah 39:2

39:2 It lasted until the ninth day of the fourth month of Zedekiah’s eleventh year. On that day they broke through the city walls.

Jeremiah 52:6

52:6 By the ninth day of the fourth month the famine in the city was so severe the residents had no food.

Zechariah 8:19

8:19 “The Lord who rules over all says, ‘The fast of the fourth, fifth, seventh, and tenth months will become joyful and happy, pleasant feasts for the house of Judah, so love truth and peace.’