Matsyapurana 124.36

124.36

ataḥ paraṃ hrasantībhir gobhirastaṃ sa gacchati
udayāstamayābhyāṃ ca smṛte pūrvāpare tu vai //

The sun goes regularly to his two abodes, Udayâ (rising) and Astamaya (setting), and his rays fall on three cities of the Devas, in the morning, at noon, and in the afternoon respectively. The rays of the rising sun grow stronger and stronger until at noon they reach their greatest intensity. After noon time He trudges along with subdued rays until He sets down. The sunrise and the sunset create east and west respectively.—34-36.