AVŚ, 8, 4, 5.2 tapurvadhebhir ajarebhir attriṇo ni parśāne vidhyataṃ yantu nisvaram //

AVŚ, 12, 2, 14.1 saṃkasuko vikasuko nirṛtho yaś ca nisvaraḥ /

ṚV, 7, 1, 7.2 pra nisvaraṃ cātayasvāmīvām //

ṚV, 7, 104, 5.2 tapurvadhebhir ajarebhir atriṇo ni parśāne vidhyataṃ yantu nisvaram //