2 Maccabees 10:17

17 Attacking them vigorously, they gained possession of the places, and beat off all who fought upon the wall, and slaughtered those whom they encountered, killing no fewer than twenty thousand.

2 Maccabees 10:17 In-Context

15 Besides this, the Idumeans, who had control of important strongholds, were harassing the Jews; they received those who were banished from Jerusalem, and endeavored to keep up the war.
16 But Maccabeus and his forces, after making solemn supplication and imploring God to fight on their side, rushed to the strongholds of the Idumeans.
17 Attacking them vigorously, they gained possession of the places, and beat off all who fought upon the wall, and slaughtered those whom they encountered, killing no fewer than twenty thousand.
18 When at least nine thousand took refuge in two very strong towers well equipped to withstand a siege,
19 Maccabeus left Simon and Joseph, and also Zacchaeus and his troops, a force sufficient to besiege them; and he himself set off for places where he was more urgently needed.
New Revised Standard Version Bible, copyright 1989, Division of Christian Education of the National Council of the Churches of Christ in the United States of America. Used by permission. All rights reserved.