IV Maccabees 13:22-27

22 and increase the more powerfully by reason of this simultaneous rearing, and by daily intercourse, and by other education, and exercise in the law of God.
23 Brotherly love being thus sympathetically constituted, the seven brethren had a more sympathetic mutual harmony.
24 For being educated in the same law, and practising the same virtues, and reared up in a just course of life, they increased this harmony with each other.
25 For a like ardour for what is right and honourable increased their fellow-feeling towards each other.
26 For it acting along with religion, made their brotherly feeling more desirable to them.
27 And yet, although nature and intercourse and virtuous morals increased their brotherly love those who were left endured to behold their brethren, who were ill-used for their religion, tortured even unto death.

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