Shiva Purana
शिवेच्छया पराशक्तिः शिवतत्त्वैकतां गता ॥ ततः परिस्फुरत्यादौ सर्गे तैलं तिलादिव ॥ १८ ॥
At the will of Śiva, the great Śakti united with Śivatattva manifests from it at the first creation, like the oil from the gingelly seed.
english translation
zivecchayA parAzaktiH zivatattvaikatAM gatA ॥ tataH parisphuratyAdau sarge tailaM tilAdiva ॥ 18 ॥
hk transliteration by Sanscript