II Maccabees 5:25

25 Who coming to Jerusalem, and pretending peace, did forbear till the holy day of the sabbath, when taking the Jews keeping holy day, he commanded his men to arm themselves.

II Maccabees 5:25 In-Context

23 And at Garizim, Andronicus; and besides, Menelaus, who worse than all the rest bare an heavy hand over the citizens, having a malicious mind against his countrymen the Jews.
24 He sent also that detestable ringleader Apollonius with an army of two and twenty thousand, commanding him to slay all those that were in their best age, and to sell the women and the younger sort:
25 Who coming to Jerusalem, and pretending peace, did forbear till the holy day of the sabbath, when taking the Jews keeping holy day, he commanded his men to arm themselves.
26 And so he slew all them that were gone to the celebrating of the sabbath, and running through the city with weapons slew great multitudes.
27 But Judas Maccabeus with nine others, or thereabout, withdrew himself into the wilderness, and lived in the mountains after the manner of beasts, with his company, who fed on herbs continually, lest they should be partakers of the pollution.

The Brenton translation of the Septuagint is in the public domain.