זוהר שמות — דף רו ע”ב

When reading the Torah, all are silent and one reads, as it was at the revelation at Sinai. The Torah reader is his Master's emissary and must first set things right in his own home. The reader must not break the paracha except where Moses made the division. Each paracha is crowned and stands before the Holy One, with a dedicated chariot among the fifty-three holy chariots under Yofiel. Each chariot is assigned to a specific paracha of a specific Shabbat, and they must not be mixed even by a hairbreadth.