Agniveshyagrihyasutra 2.5.11.6

2.5.11.6

yasmin kāle paścād vāto vāti tasmin kāle brāhmaṇo mārutamasi marutāmoja iti kṛṣṇaṃ vāsaḥ paridhāya apa upaspṛśya yajñopavītaṃ dhṛtvāpa ācamya udapātramādāya paścād bhūtaṃ pratiṣṭhāpyārcayati \

At the time when a west wind blows, at that time the Brahmin, having put on the black garment with "You belong to the Maruts, the strength of the Maruts," having touched water, put on the sacred thread, sipped water, and taken a vessel of water, establishes the being behind [the fire] and worships it.