Agniveshyagrihyasutra 2.2.5.17

2.2.5.17

tebhyo nidhānaṃ bahudhā vyaicchannantarā dyāvāpṛthivī apaḥ suvaḥ iti goṣṭhaudumbare darbhastambe vā nikhanati yo 'sya rātirbhavati \

sought many a place of concealment for them between heaven and earth, the waters, [and] the sun"—with this [formula] he buries [them] in a cowpen, at [the foot of] an udumbara tree, or in a clump of darbha grass, whoever is his benefactor.