Shiva Purana
पञ्चगव्यं च मधुरं पयो दधि घृतं तथा ॥ कपिलासम्भवं शम्भोरिष्टं स्नाने च पानके ॥ २४ ॥
Pañcagavya consisting of sweet milk, curd and ghee all taken from tawny cows is favourite of Śiva for bath and drink.
english translation
paJcagavyaM ca madhuraM payo dadhi ghRtaM tathA ॥ kapilAsambhavaM zambhoriSTaM snAne ca pAnake ॥ 24 ॥
hk transliteration by Sanscript