I am the reservoir of unlimited potency, and therefore I am known as unlimited or all-pervading. From My material energy the cosmic manifestation appeared within Me, and in this universal manifestation appeared the chief being, Lord Brahmā, who is your source and is not born of a material mother.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
मय्यनन्तगुणेऽनन्ते गुणतो गुणविग्रहः । यदासीत्तत एवाद्यः स्वयम्भूः समभूदजः
mayyanantaguṇe'nante guṇato guṇavigrahaḥ | yadāsīttata evādyaḥ svayambhūḥ samabhūdajaḥ
SB 6.4.48