Śatapatha Brāhmaṇa ("of a hundred paths") 1.3.4.2

1.3.4.2

sa madhyamamevāgre | paridhiṃ paridadhāti gandharvastvā viśvāvasuḥ paridadhātu viśvasyāriṣṭyai yajamānasya paridhirasyagniriḍa īḍita iti

The middle stick he lays down first (on the west side of the fire), with the text (Vâg. S. II, 3), 'May the Gandharva Visvâvasu lay thee around for the security of the All! Thou art a fence to the sacrificer, thou (art) Agni, invoked and worthy of invocation!'