I Maccabees 2:64

64 Wherefore, ye my sons, be valiant and shew yourselves men in the behalf of the law; for by it shall ye obtain glory.

I Maccabees 2:64 In-Context

62 Fear not then the words of a sinful man: for his glory shall be dung and worms.
63 To day he shall be lifted up and to morrow he shall not be found, because he is returned into his dust, and his thought is come to nothing.
64 Wherefore, ye my sons, be valiant and shew yourselves men in the behalf of the law; for by it shall ye obtain glory.
65 And behold, I know that your brother Simon is a man of counsel, give ear unto him alway: he shall be a father unto you.
66 As for Judas Maccabeus, he hath been mighty and strong, even from his youth up: let him be your captain, and fight the battle of the people.

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