Surya Siddhanta
प्रवहाख्यो मरुत् ताम्स् तु स्वोच्चाभिमुखम् ईरयेत् । पूर्वापराकृष्टास् ते *गतिम् यान्ति पृथग्विधाः ॥ (C गतीर्, पृथग्विधाम्)
(Besides this) a (great) wind called Pravaha carries the planets (westward) which are also attracted towards their apogees. Thus the planets being attracted (at once) to the east and west get the various motions.
english translation
pravahAkhyo marut tAms tu svoccAbhimukham Irayet । pUrvAparAkRSTAs te *gatim yAnti pRthagvidhAH ॥ (C gatIr, pRthagvidhAm)
hk transliteration by Sanscript