IV Maccabees 13:23

23 Brotherly love being thus sympathetically constituted, the seven brethren had a more sympathetic mutual harmony.

IV Maccabees 13:23 In-Context

21 and having been brought forth at equal intervals, and having sucked milk from the same fountains, hence their brotherly souls are reared up lovingly together;
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.

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