Shiva Purana
निजेच्छया जगत्सृष्टमुद्युक्तस्य महेशितुः॥ प्रथमो यः परिस्पन्दश्शिव तत्त्वन्तदुच्यते॥ ७०॥
The primeval oozing of Śiva who attempts to create the universe at his will is called Śivatattva.
english translation
nijecchayA jagatsRSTamudyuktasya mahezituH॥ prathamo yaH parispandazziva tattvantaducyate॥ 70॥
hk transliteration by Sanscript