CC Ādi 6.98

eka-mātra ‘aṁśī’ — kṛṣṇa, ‘aṁśa’ — avatāra
aṁśī aṁśe dekhi jyeṣṭha-kaniṣṭha-ācāra
Word for word: 
eka-mātra — only one; aṁśī — source of all incarnations; kṛṣṇa — Lord Kṛṣṇa; aṁśa — of the part; avatāra — incarnations; aṁśī — is the source of all incarnations; aṁśe — in the incarnation; dekhi — we can see; jyeṣṭha — as superior; kaniṣṭha — and inferior; ācāra — behavior.
Translation: 
Lord Kṛṣṇa is the source of all incarnations, and all others are His parts or partial incarnations. We find that the whole and the part behave as superior and inferior.