Shiva Purana

siva.sh/siva-purana/rudra-samhita/6/19

शक्तिस्तदैकलेनापि स्वैरं विहरता तनुः ।। स्वविग्रहात्स्वयं सृष्टा स्वशरीरानपायिनी ।। १९ ।।

sanskrit

Īśvara though alone, then created the physical form Śakti from his body. This Śakti did not affect his body in any way.

english translation

zaktistadaikalenApi svairaM viharatA tanuH || svavigrahAtsvayaM sRSTA svazarIrAnapAyinI || 19 ||

hk transliteration by Sanscript