Śatapatha Brāhmaṇa ("of a hundred paths") 2.1.2.13

2.1.2.13

citrāyāmagnī ādadhīta | devāśca vā asurāścobhaye prājāpatyāḥ paspṛdhire ta ubhaya evāmuṃ lokaṃ samārurukṣāṃ cakrurdivameva tato 'surā rauhiṇamityagniṃ cikyire 'nenāmuṃ lokaṃ samārokṣyāma iti

He may also set up his fires under Kitrâ. Now the gods and the Asuras, both of them sprung from Pragâpati, were contending for superiority. Both parties were desirous of rising to yonder world, the sky. The Asuras then constructed the fire (altar) called rauhina (fit to ascend by), thinking, 'Thereby we shall ascend (â-ruh) to the sky.'