1QS III, 17-21 · the Community Rule, ~150 BCE
"He created man to govern the world, and appointed for him two spirits in which to walk until the season of His visitation: they are the Spirits of Truth and of Falsehood. From the spring of light come the generations of truth, and from the well of darkness the generations of falsehood. All the children of righteousness are ruled by the Prince of Light and walk in the ways of light, but all the children of falsehood are ruled by the Angel of Darkness and walk in the ways of darkness."
This is Yasna 30 translated into Hebrew theological idiom. Two spirits, truth and the lie, light and darkness, a Prince of Light and an Angel of Darkness, every soul walking in one or the other. Iranists from Shaul Shaked to Anders Hultgård identify this passage as the closest verbal parallel to the Gathas anywhere in Second Temple literature.
John 1:4-5; 1 John 1:5-7 · Christian inheritance
"In him was life, and the life was the light of men. The light shines in the darkness, and the darkness has not overcome it." "God is light and in him is no darkness at all... if we walk in the light as he is in the light." The Johannine community inherits the Qumran dualism, which inherits the Gathic dualism.