SB 10.85.3

kṛṣṇa kṛṣṇa mahā-yogin
 saṅkarṣaṇa sanātana
jāne vām asya yat sākṣāt
 pradhāna-puruṣau parau
Synonyms: 
kṛṣṇa kṛṣṇa — O Kṛṣṇa, Kṛṣṇa; mahā-yogin — O greatest yogī; saṅkarṣaṇa — O Balarāma; sanātana — eternal; jāne — I know; vām — You two; asya — of this (universe); yat — which; sākṣāt — directly; pradhāna — the creative principle of nature; puruṣau — and the creating Personality of Godhead; parau — supreme.
Translation: 
[Vasudeva said:] O Kṛṣṇa, Kṛṣṇa, best of yogīs, O eternal Saṅkarṣaṇa! I know that You two are personally the source of universal creation and the ingredients of creation as well.
Purport: 

As taught in the Sāṅkhya doctrine of Lord Kapiladeva, pradhāna is the creative energy of the puruṣa, the Supreme Person. Thus, of these two principles, the pradhāna is the predominated energy, female, incapable of independent action, while the puruṣa is the absolutely independent, primeval creator and enjoyer. Neither Kṛṣṇa nor His brother Balarāma belong to the category of subordinate energy; rather, both of Them together are the original puruṣa, who is always joined by His manifold potencies of pleasure, knowledge and creative emanation.