Srimad-Bhagavatam: Canto 8 - Chapter 1 - Verse 5
आद्यन्तावस्य यन्मध्यमिदमन्यदहं बहि: । यतोऽव्ययस्य नैतानि तत् सत्यं ब्रह्म चिद्भवान् ॥ ५ ॥
ādy-antāv asya yan madhyamidam anyad ahaṁ bahiḥyato ’vyayasya naitānitat satyaṁ brahma cid bhavān
The manifest, the unmanifest, false ego and the beginning, maintenance and annihilation of this cosmic manifestation all come from You, the Supreme Personality of Godhead. But because You are the Absolute Truth, the supreme absolute spirit soul, the Supreme Brahman, such changes as birth, death and sustenance do not exist in You.
According to the Vedic mantras, yato vā imāni bhūtāni jāyante: everything is an emanation of the Supreme Personality of Godhead. As stated by the Lord Himself in Bhagavad-gītā (7.4): “Earth, water, fire, air, ether, mind, intelligence and false ego — all together these eight comprise My separated material energies.” In other words, the ingredients of the cosmic manifestation also consist of the energy of the Supreme Personality of Godhead. This does not mean, however, that because the ingredients come from Him, He is no longer complete. Pūrṇasya pūrṇam ādāya pūrṇam evāvaśiṣyate: “Because He is the complete whole, even though so many complete units emanate from Him, He remains the complete balance.” Thus the Lord is called avyaya, inexhaustible. Unless we accept the Absolute Truth as acintya-bhedābheda, simultaneously one and different, we cannot have a clear conception of the Absolute Truth. The Lord is the root of everything. Aham ādir hi devānām: He is the original cause of all the devas, or demigods. Ahaṁ sarvasya prabhavaḥ: everything emanates from Him. In all cases — nominative, objective, positive, negative and so on — whatever we may conceive of in this entire cosmic manifestation is in fact the Supreme Lord. For Him there are no such distinctions as “this is mine, and this belongs to someone else,” because He is everything. He is therefore called avyaya — changeless and inexhaustible. Because the Supreme Lord is avyaya, He is the Absolute Truth, the fully spiritual Supreme Brahman.