IV Maccabees 6:18

18 for it were irrational, if having lived up to old age in all truth, and having scrupulously guarded our character for it, we should now turn back,

IV Maccabees 6:18 In-Context

16 And Eleazar, as though the advice more painfully tortured him, cried out,
17 Let not us who are children of Abraham be so evil advised as by giving way to make use of an unbecoming pretence;
18 for it were irrational, if having lived up to old age in all truth, and having scrupulously guarded our character for it, we should now turn back,
19 and ourselves should become a pattern of impiety to the young, as being an example of pollution eating.
20 It would be disgraceful if we should live on some short time, and that scorned by all men for cowardice,

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