एतद्योनीनि भूतानि सर्वाणीत्युपधारय। अहं कृत्स्नस्य जगतः प्रभवः प्रलयस्तथा ॥

etad-yonīni bhūtāni sarvāṇītyupadhāraya ahaṁ kṛitsnasya jagataḥ prabhavaḥ pralayas tathā

Know this to be the womb of all beings. I am the source of the forthgoing of the whole universe and likewise the place of its dissolving.

In plain words: Krishna says his two natures are where all beings come from. He is the source from which the whole universe begins and the place where it ends.