Shiva Purana
स्पष्टाक्षरो बुधो मंत्रः समानः सारसंप्लवः ॥ युगादिकृद्युगावर्तो गंभीरो वृषवाहनः ॥ ४६॥
The clearly syllabic Buddha mantra is the same as the flood of essence. He is the creator of the ages and the revolver of the ages He is deep and carries a bull.
english translation
spaSTAkSaro budho maMtraH samAnaH sArasaMplavaH ॥ yugAdikRdyugAvarto gaMbhIro vRSavAhanaH ॥ 46॥
hk transliteration by Sanscript