Śatapatha Brāhmaṇa ("of a hundred paths") 7.2.1.8

7.2.1.8

tābhiretāṃ diśaṃ yanti | eṣā vai nairṛtī diṅnairṛtyāmeva taddiśi nirṛtiṃ dadhāti sa yatra svakṛtaṃ veriṇaṃ śvabhrapradaro vā syāttadenā upadadhyādyatra vā asyā avadīryate yatra vāsyā oṣadhayo na jāyante nirṛtīrhāsyai tadgṛhṇāti naiṛta eva tadbhūmernirṛtiṃ dadhāti tāḥ parācīrlokabhājaḥ kṛtvopadadhāti

With them they proceed towards that (southwestern) quarter, for that is Nirriti's quarter: he thus places Nirriti (corruption) in Nirriti's quarter. And anywhere where there is a self-produced hollow or cleft in the ground, he lays down those (bricks); for on whatever part of this (earth) there is a cleaving, or in whatever part of it plants are not produced, verily that part of it Nirriti seizes upon: he thus places corruption in a (part) of the earth set aside for Nirriti. Having put them in their places in a direction away from himself, he lays them down.