Shiva Purana

siva.sh/siva-purana/saturda-samhita/5/58

तत्र श्रुतिसमूहानां विधानं ब्रह्मलक्षणम् ।। भविष्यति तदा कल्पे कृष्णद्वैपायनो यदा ।। ५८ ।।

sanskrit

The classification of the Vedas was the characteristic sign of the Kalpa when Kṛṣṇa Dvaipāyana became the chief redactor.

english translation

tatra zrutisamUhAnAM vidhAnaM brahmalakSaNam || bhaviSyati tadA kalpe kRSNadvaipAyano yadA || 58 ||

hk transliteration by Sanscript