यत्र काले त्वनावृत्तिमावृत्तिं चैव योगिनः। प्रयाता यान्ति तं कालं वक्ष्यामि भरतर्षभ ॥

yatra kāle tvanāvṛittim āvṛittiṁ chaiva yoginaḥ prayātā yānti taṁ kālaṁ vakṣhyāmi bharatarṣhabha

That time wherein going forth Yogîs return not, and also that wherein going forth they return, that time shall I declare to thee, O prince of the Bhâratas.

In plain words: Krishna says he will now explain two kinds of times for leaving the body. Yogis who die at one time do not return to this world. Those who die at the other time do return.