VaikhGS, 1, 20, 1.0 tatpātreṇādhāvamādāya sruveṇāntaritam agnis tṛpyatv ity upāgni paścimato vedistṛpyatviti vedyāṃ dyaus tṛpyatv ity ākāśe pṛthivī tṛpyatviti bhūmau brahmādyāstṛpyantāmiti dakṣiṇasyāṃ tarpayati //

Kāśikāvṛtti zu Aṣṭādhyāyī, 1, 1, 41.1, 1.3 luk upāgni pratyagni śalabhāḥ patanti /

Kāśikāvṛtti zu Aṣṭādhyāyī, 1, 1, 41.1, 1.4 mukhasvaraḥ upāgnimukhaḥ pratyagnimukhaḥ /