Shankhayanagrihyasutra 2.13.8

2.13.8

: tad apy etat /

'Let him sacrifice the sacrificial cord and the staff, the girdle and also the skin in water after the completion of his vow with a Varuna-verse or with the essence (of the Vedas, i.e. the syllable Om).

2.13.8.p1

: yajña upavītam daṇḍam ca mekhalām ajinam tathā.|.juhuyād apsu vrate pūrṇe vāruṇyā ṛcā rasena vā /