Re'uyot Yechezkelראויות יחזקאל

"The Visions of Ezekiel": the prophet looks into the river Chebar and sees the seven heavens reflected in the water — each heaven named, each with its chariot. Ascent by reflection: the earliest text to map the sevenfold heavens this systematically, and a reminder that the deep sky can be entered through any sufficiently still surface.