IV Maccabees 13:22

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.

IV Maccabees 13:22 In-Context

20 In which these brothers having remained an equal time, and having been formed for the same period, and been increased by the same blood, and having been perfected through the same principle of life,
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.

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