अव्यक्ताद्व्यक्तयः सर्वाः प्रभवन्त्यहरागमे। रात्र्यागमे प्रलीयन्ते तत्रैवाव्यक्तसंज्ञके
avyaktād vyaktayaḥ sarvāḥ prabhavantyahar-āgame rātryāgame pralīyante tatraivāvyakta-sanjñake
At the dawn of that day, all objects in manifestation stream forth from the Unmanifest, and when evening falls, they are dissolved back into it again.
Translated by Shri Purohit Swami
From the Unmanifested, all the manifested worlds proceed upon the arrival of the 'day'; upon the arrival of the 'night', they dissolve indeed into that which is known as the Unmanifested.
Translated by Swami Sivananda
Word meanings (from the gita/gita dataset)
avyaktāt—from the unmanifested; vyaktayaḥ—the manifested; sarvāḥ—all; prabhavanti—emanate; ahaḥ-āgame—at the advent of Brahma’s day; rātri-āgame—at the fall of Brahma’s night; pralīyante—they dissolve; tatra—into that; eva—certainly; avyakta-sanjñake—in that which is called the unmanifest