CC Ādi 1.71

citraṁ bataitad ekena
vapuṣā yugapat pṛthak
gṛheṣu dvy-aṣṭa-sāhasraṁ
striya eka udāvahat
Synonyms: 
citram — wonderful; bata — oh; etat — this; ekena — with one; vapuṣā — form; yugapat — simultaneously; pṛthak — separately; gṛheṣu — in the houses; dvi-aṣṭa-sāhasram — sixteen thousand; striyaḥ — all the queens; ekaḥ — the one Śrī Kṛṣṇa; udāvahat — married.
Translation: 
“It is astounding that Lord Śrī Kṛṣṇa, who is one without a second, expanded Himself in sixteen thousand similar forms to marry sixteen thousand queens in their respective homes.”
Purport: 

This verse is from Śrīmad-Bhāgavatam (10.69.2).