Caitanya-caritāmṛta 2.70
avatāra saba — puruṣera kalā, aṁśa svayaṁ-bhagavān kṛṣṇa sarva-avataṁsa
[avataara saba — purushera kalaa, amsha svayam-bhagavaan krishna sarva-avatamsa]
Blended reading (Sanskrit + English inline)
avatāra saba — puruṣera kalā, aṁśa svayaṁ-bhagavān kṛṣṇa sarva-avataṁsa
All the incarnations of Godhead are plenary portions or parts of the plenary portions of the puruṣa-avatāras, but the primeval Lord is Śrī Kṛṣṇa. He is the Supreme Personality of Godhead, the fountainhead of all incarnations.
My note
Source: vedabase.io