Parallels for PB, 6, 7.18.0

Text line: yajño vai devebhyo 'śvo bhūtvāpākrāmat taṃ devāḥ prastareṇāramayaṃs tasmād aśvaḥ prastareṇa saṃmṛjyamāna upāvaramate yad adhvaryuḥ prastaraṃ harati yajñasya śāntyā apratrāsāya //
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