Srimad-Bhagavatam: Canto 10 - Chapter 1 - Verse 30

Sanskrit:

आत्मन्येवात्मनात्मानं सृजे हन्म्यनुपालये ।आत्ममायानुभावेन भूतेन्द्रियगुणात्मना ॥ ३० ॥

ITRANS:

ātmany evātmanātmānaṁsṛje hanmy anupālayeātma-māyānubhāvenabhūtendriya-guṇātmanā

Translation:

By Myself I create, sustain and withdraw Myself within Myself by the power of My personal energy, which comprises the material elements, the senses and the modes of nature.

Purport:

Although the Lord is the supreme entity, there is no absolute duality between Him and His creation, since the creation is an extension of His being. This oneness is here emphasized by the Lord.