Shiva Purana
अनंतरं तु वक्त्रेभ्यो वेदास्तस्य विनिर्गताः ॥ प्रवृत्तिस्सर्वशास्त्राणां तन्मुखादभवत्ततः ॥ ३२ ॥
The Vedas came out of his mouths. The Śāstras too had their origin from him.
english translation
anaMtaraM tu vaktrebhyo vedAstasya vinirgatAH ॥ pravRttissarvazAstrANAM tanmukhAdabhavattataH ॥ 32 ॥
hk transliteration by Sanscript