Bhagavad Gita 8.23

यत्र काले त्वनावृत्तिमावृत्तिं चैव योगिनः।प्रयाता यान्ति तं कालं वक्ष्यामि भरतर्षभ ॥८.२३॥

yatra kāle tvanāvṛttimāvṛttiṃ caiva yoginaḥprayātā yānti taṃ kālaṃ vakṣyāmi bharatarṣabha

Now I will tell you, O chief of the Bharatas, the times of departure at which the Yogis will return or not return.

गीता