sarva-bhūtāni kaunteya prakṛitiṁ yānti māmikām
kalpa-kṣhaye punas tāni kalpādau visṛijāmyaham||7||

Meaning : O Kaunteya (son of Kunti), at the end of a kalpa (cosmic cycle), all living beings merge into My material nature (prakriti); and at the beginning of the next kalpa, I again manifest them.