Vedapadapathacarca p88

Vedapadapāṭhacarcā p88

kramo dvābhyāmabhikramya pratyādāyottaraṃ tayoḥ| uttareṇopasaṃdadhyāt tathārdharcaṃ samāpayet || (ṛkprātiśākhya X. 1)