III Maccabees 7:9-19

9 For know ye, that should we conceive any evil design, or in any way aggrieve them, we shall ever have as our opposite, not man, but the highest God, the ruler of all might. From Him there will be no escape, as the avenger of such deeds. Fare ye well.
10 When they had received this letter, they were not forward to depart immediately. They petitioned the king to be allowed to inflict fitting punishment upon those of their race who had willingly transgressed the holy god, and the law of God.
11 They alleged that men who had for their bellies' sake transgressed the ordinances of God, would never be faithful to the interests of the king.
12 The king admitted the truth of this reasoning, and commended them. Full power was given them, without warrant or special commission, to destroy those who had transgressed the law of God boldly in every part of the king's dominions.
13 Their priests, then, as it was meet, saluted him with good wishes, and all the people echoed with the Hallelujah. They then joyfully departed.
14 Then they punished and destroyed with ignominy every polluted Jew that fell in their way;
15 slaying thus, in that day, above three hundred men, and esteeming this destruction of the wicked a season of joy.
16 They themselves having held fast their God unto death, and having enjoyed a full deliverance, departed from the city garlanded with sweet-flowered wreaths of every kind. Uttering exclamations of joy, with songs of praise, and melodious hymns they thanked the God of their fathers, the eternal Saviour of Israel.
17 Having arrived at Ptolemais, called from the specialty of that district Rose-bearing, where the fleet, in accordance with the general wish, waited for them seven days,
18 they partook of a banquet of deliverance, for the king generously granted them severally the means of securing a return home.
19 They were accordingly brought back in peace, while they gave utterance to becoming thanks; and they determined to keep these days during their sojourn as days of joyfulness.

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