The Supreme Living Being in His feature as the transcendental puruṣa incarnation, who is the Lord’s plenary expansion, impregnates the material nature of three modes, and thus by the influence of eternal time the living entities appear.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
कालवृत्त्या तु मायायां गुणमय्यामधोक्षजः । पुरुषेणात्मभूतेन वीर्यमाधत्त वीर्यवान्
kālavṛttyā tu māyāyāṃ guṇamayyāmadhokṣajaḥ | puruṣeṇātmabhūtena vīryamādhatta vīryavān
SB 3.5.26