IV Maccabees 13:9

9 Brothers, may we die brotherly for the law. Let us imitate the three young men in Assyria who despised the equally afflicting furnace.

IV Maccabees 13:9 In-Context

7 so that seven-towered right-reasoning of the young men, securing the harbour of religion, conquered the intermperance of passions.
8 For having arranged a holy choir of piety, they encouraged one another, saying,
9 Brothers, may we die brotherly for the law. Let us imitate the three young men in Assyria who despised the equally afflicting furnace.
10 Let us not be cowards in the manifestation of piety.
11 And one said, Courage, brother; and another, Nobly endure.

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