Verses with the word thirteenth in the Apocrypha (3 verses):

Additions to Esther 16:20
And ye shall aid them, that even the same day, being the thirteenth day of the twelfth month Adar, they may be avenged on them, who in the time of their affliction shall set upon them.

1 Maccabees 7:43
So the thirteenth day of the month Adar the hosts joined battle: but Nicanor's host was discomfited, and he himself was first slain in the battle.

1 Maccabees 7:49
Moreover they ordained to keep yearly this day, being the thirteenth of Adar.