CC Ādi 4.11-12
yuga-manvantarāvatāra, yata āche āra
aiche avatare kṛṣṇa bhagavān pūrṇa
nārāyaṇa — Lord Nārāyaṇa; catuḥ-vyūha — the four expansions; matsya-ādi — beginning with Matsya; avatāra — the incarnations; yuga-manv-antara-avatāra — the yuga and manv-antara incarnations; yata — as many as; āche — there are; āra — other; sabe — all; āsi’ — coming; kṛṣṇa-aṅge — in the body of Lord Kṛṣṇa; haya — are; avatīrṇa — incarnated; aiche — in this way; avatare — incarnates; kṛṣṇa — Lord Kṛṣṇa; bhagavān — the Supreme Personality of Godhead; pūrṇa — full.
Lord Nārāyaṇa, the four primary expansions [Vāsudeva, Saṅkarṣaṇa, Pradyumna and Aniruddha], Matsya and the other līlā incarnations, the yuga-avatāras, the manv-antara incarnations and as many other incarnations as there are — all descend in the body of Lord Kṛṣṇa. In this way the complete Supreme Godhead, Lord Kṛṣṇa Himself, appears.