Jupiter in the natural zodiac rules the 9th and 12th house.
The natural zodiac is known as Kalapurusha in Sanskrit — personified time, the manifest part of God, His form, which is available to our perception and comprehension.
Everyone knows that man is created in the likeness of God. Accordingly, just as each house from Lagna in an individual horoscope shows a certain part of the body (head, mouth and neck, arms and shoulders, chest, etc.), so each sign indicates the corresponding part of the body of God.