SB 10.59.33

tatra rājanya-kanyānāṁ
 ṣaṭ-sahasrādhikāyutam
bhaumāhṛtānāṁ vikramya
 rājabhyo dadṛśe hariḥ
Synonyms: 
tatra — there; rājanya — of the royal order; kanyānām — of maidens; ṣaṭ-sahasra — six thousand; adhika — more than; ayutam — ten thousand; bhauma — by Bhauma; āhṛtānām — taken; vikramya — by force; rājabhyaḥ — from kings; dadṛśe — saw; hariḥ — Lord Kṛṣṇa.
Translation: 
There Lord Kṛṣṇa saw sixteen thousand royal maidens, whom Bhauma had taken by force from various kings.
Purport: 

Śrīla Śrīdhara Svāmī provides evidence from the sage Parāśara, as quoted in the Viṣṇu Purāṇa (5.29.31), to the effect that there were actually 16,100 royal maidens imprisoned in Bhauma’s palace:

kanyā-pure sa kanyānāṁ
 ṣoḍaśātulya-vikramaḥ
śatādhikāni dadṛśe
 sahasrāṇi mahā-mate

“Within the maidens’ quarters, O wise one, that Lord of unequaled prowess found 16,100 princesses.”

Another relevant verse from the Viṣṇu Purāṇa (5.29.9) is as follows:

deva-siddhāsurādīnāṁ
 nṛpānāṁ ca janārdana
hṛtvā hi so ’suraḥ kanyā
 rurodha nija-mandire

“The demon [Bhaumāsura] kidnapped the unmarried daughters of demigods, siddhas, asuras and kings, O Janārdana, and imprisoned them in his palace.”