Revākhaṇḍa ascribed to the Vāyupurāṇa (RKV) 191.13

191.13

indrastapati pūrveṇa dhātā caivāgnigocare /
gabhastipatirvai yāmye tvaṣṭā nairṛtadiṅmukhaḥ //

Indra blazes in the east, and Dhātṛ in the south-east; / Gabhastipati blazes in the south, and Tvaṣṭṛ facing the south-west direction;