Matsyapurana 53.58

53.58

caturlakṣamidaṃ proktaṃ vyāsenādbhutakarmaṇā
matpiturmama pitrā ca mayā tubhyaṃ niveditam //

Sûta said:—Vyâsa, of wonderful activity, explained these eighteen Purâṇas, to the extent of 4 lacs of slokas, to my father, and the latter told me about it; and I, O Ṛiṣis! have described the same to you.—57.