Bhagavatapurana 2.7.36

2.7.36

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kālena mīlitadhiyām avamṛśya nṇāṃ $ stokāyuṣāṃ svanigamo bata dūrapāraḥ &
kālena mīlitadhiyām avamṛśya nṇāṃ $ stokāyuṣāṃ svanigamo bata dūrapāraḥ &
āvirhitastvanuyugaṃ sa hi satyavatyāṃ % vedadrumaṃ viṭapaśo vibhajiṣyati sma //

36. When the Vedas (स्वनिगम:) produced by Him cannot be completely studied from the beginning to the end by men, who by virtue of (changed) time have poor intellectual powers, He the Lord who manifests Himself in every yuga (cycle) through Satyavati, will divide the Vedas into many branches.