This is the annihilation called prākṛtika, during which the energies belonging to the Supreme Person and His unmanifest material nature, disassembled by the force of time, are deprived of their potencies and merge together totally.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
लयः प्राकृतिको ह्येष पुरुषाव्यक्तयोर्यदा । शक्तयः सम्प्रलीयन्ते विवशाः कालविद्रुताः
layaḥ prākṛtiko hyeṣa puruṣāvyaktayoryadā | śaktayaḥ sampralīyante vivaśāḥ kālavidrutāḥ
SB 12.4.22