Midrash su Salmi 19:7

He set a limit for the sun, as it is said: His going forth is from the end of the heaven (Ps. 19:7). He determined the extent of the heavens, as it is said: From one end of the heavens unto the other (Deut. 4:32). He determined the extent of the earth, as it is said: Creator of the ends of the earth (Isa. 40:28). He fixed the time for the exodus from Egypt, as it is said: And it came to pass at the end of four hundred and thirty years (Exod. 12:41). He set a limit to darkness, as is said: Man setteth an end to darkness and searcheth out to the furthest bound (Job 28:3). And He likewise determined the length of Joseph’s imprisonment, as it is said: And it came to pass at the end of two full years.

The aperture which is in the midst of the firmament is named M'zarim and (the sun) does not go forth or set therein except once in its great cycle; (thereon) it goes through it as on the day when it was created. At night the sun is in the west. At the Teḳuphah of Tishri and at the Teḳuphah of Ṭebeth the sun goes on its course in the south quarter and in the waters of the Ocean (which are) between the ends of the heavens and the ends of the earth where it is submerged. For the night is long and the way is long until (the sun) reaches the aperture which is in the east, (even) the aperture through which it desires to go forth, as it is said, "It goeth toward the south, and turneth about unto the north" (Eccles. 1:6). It goes to the south at the Teḳuphah of Tishri and at the Teḳuphah of Ṭebeth, and turns to the north at the Teḳuphah of Nisan and at the Teḳuphah of Tammuz. It goes on its course for six months in the south quarter, and for six months in the north quarter, and owing to its circuits the sun returns to the aperture which is in the east. The sun has three letters of (God's) Name written upon his heart, and the angels lead him; such || as lead him by day do not lead him by night, and such as lead him by night do not lead him by day. The sun rides in a chariot and rises, crowned as a bridegroom, as it is said, "Which is as a bridegroom coming out of his chamber, and rejoiceth as a strong man to run his course" (Ps. 19:5). The sun's rays and face, which are turned downwards (to the earth), are of hail; and were it not for the hail which quenches the flames of fire the world would be consumed by fire, as it is said, "And there is nothing hid from the heat thereof" (Ps. 19:6). In winter (the sun) turns the upper (half of) his face downwards, and were it not for the fire which warms the face of hail the world could not endure because of the ice (cold), as it is said, "Who can stand before his cold?" (Ps. 147:17). These are the ends of the ways of the sun.

Rabbi Joshua, son of Ḳorchah, said: Forty days was Moses on the mountain, reading the Written Law by day, and studying the Oral Law by night. After the forty days he took the tables (of the Law) and descended into the camp on the 17th of Tammuz, and he broke in pieces the tables, and slew the sinners in Israel. He then spent forty days in the camp, until he had burnt the calf, and powdered it like the dust of the earth, and he had destroyed the idol worship from Israel, and he instituted every tribe in its place. And on the New Moon of Ellul the Holy One, blessed be He, said to him: "Come up || to me on the mount" (Ex. 24:12), and let them sound the Shophar (trumpet) throughout the camp, for, behold, Moses has ascended the mount, so that they do not go astray again after the worship of idols. The Holy One, blessed be He, was exalted with that Shophar, as it is said, "God is exalted with a shout, the Lord with the sound of a trumpet" (Ps. 47:5). Therefore the sages instituted that the Shophar should be sounded on the New Moon of Ellul every year.