Stephen quotes from Amos 5:25–27. In his quotation he makes use of the Septuagint which has some slight differences to the Masoretic text (used by most modern English Bible translations). Moloch was the god of the sky and the sun to whom some brought child sacrifices, and Rephan was possibly the name of an Egyptian god associated with Saturn.1 Stephen’s quotation is meant to show that rejection of God’s servants is something which has happened again and again.
42 Alors Dieu se détourna, et les livra au culte de l'armée du ciel, selon qu'il est écrit dans le livre des prophètes:M'avez-vous offert des victimes et des sacrificesPendant quarante ans au désert, maison d'Israël?