आब्रह्मभुवनाल्लोकाः पुनरावर्तिनोऽर्जुन। मामुपेत्य तु कौन्तेय पुनर्जन्म न विद्यते ॥

ā-brahma-bhuvanāl lokāḥ punar āvartino ’rjuna mām upetya tu kaunteya punar janma na vidyate

The worlds, beginning with the world of Brahmâ, they come and go, O Arjuna; but he who cometh unto Me, O Kaunteya, he knoweth birth no more.

In plain words: Krishna says every world, even the heaven of Brahma the creator god, appears and then passes away. But a person who reaches Krishna is never born again.