Bhagavad-Gita The Song Divine Chapter 8 (stanza 12-23)

Having controlled all the senses, and firmly holding the mind in the heart, and then drawing the life-breath to the head, and thus remaining steadfast in Yogic concentration of God, he who leaves the body and departs uttering the one Indestructible Brahma, OM, and dwelling on Me in My absolute aspect, reaches the supreme goal. …………….. (12-13)

Arjun, whosoever always and constantly thinks of Me with undivided mind, to that Yogi ever absorbed in Me I am easily attainable. …………… (14)

Great souls, who have attained the highest perfection, having come to Me, are no more subject to transitory rebirth, which is the abode of sorrow and transient by nature. …. (15)

Arjun, all the worlds from Brahmaloka (the heavenly realm of the Creator, Brahma) downwards are liable to birth and rebirth. But, O son of Kunti, on attaining Me there is no rebirth (For, while I am beyond Time, regions like Brahmaloka, being conditioned by time, are transitory) …………… (16)

Those Yogis, who know from realization Brahma's day as covering a thousand Mahayugas, and so his night as extending to another thousand Mahayugas, know the reality about Time. ……….. (17)

All embodied beings emanate from the un-manifest (i.e., Brahma's subtle body) at the coming of the cosmic day; at the cosmic nightfall they merge into the same subtle body of Brahma, known as the Un-manifest. ………………….. (18)

Arjun, this multitude of beings, being born again and again, is dissolved under compulsion of its nature at the coming of the cosmic night, and rises again at the commencement of the cosmic day. …………  (19)

For beyond even this un-manifest, there is yet another un-manifest Existence, that Supreme Divine Person, who does not perish even though all beings perish. ……………. (20)

The same un-manifest which has been spoken of as the Indestructible is also called the supreme goal; that again is My supreme Abode, attaining which they return not to this mortal world.  …….. (21)

Arjun, that eternal un-manifest supreme Purusa in whom all beings reside and by whom all this is pervaded, is attainable only through exclusive Devotion. ……….. (22)

Arjun, I shall now tell you the time (path) departing when Yogis do not return, and also the time (path) departing when they do return. …………… (23)