Verse 8.18

अव्यक्ताद्व्यक्तयः सर्वाः प्रभवन्त्यहरागमे। रात्र्यागमे प्रलीयन्ते तत्रैवाव्यक्तसंज्ञके।।8.18।।

— Sanskrit (gita/gita data/verse.json)

avyaktād vyaktayaḥ sarvāḥ prabhavantyahar-āgame rātryāgame pralīyante tatraivāvyakta-sanjñake

— Transliteration (gita/gita data/verse.json)

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.

— English — Swami Sivananda (praneshp1org/Bhagavad-Gita-JSON-data translation.json)

।।8.18।। ब्रह्माजीके दिनके आरम्भकालमें अव्यक्त- (ब्रह्माजीके सूक्ष्म-शरीर-) से सम्पूर्ण प्राणी पैदा होते हैं और ब्रह्माजीकी रातके आरम्भकालमें उसी अव्यक्तमें सम्पूर्ण प्राणी लीन हो जाते हैं।

— Hindi — Swami Ramsukhdas (praneshp1org/Bhagavad-Gita-JSON-data translation.json)

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

— Word meanings (gita/gita data/verse.json)