VārŚS, 1, 6, 3, 1.3 iti snātaṃ yūpaṃ tīrthenopasādya tūṣṇīkāṃ yavamatīḥ prokṣaṇīḥ saṃskṛtya yūpaṃ prokṣati pṛthivyai tveti mūlam antarikṣāya tveti madhyaṃ dive tvety agram /