Shiva Purana
तत्रापि मम चत्वारो भविष्यन्ति सुता युगे ॥ सारस्वतश्च योगीशो मेघवाहः सुवाहनः ॥ ३०॥
There also in that aeon, four sons will be born of me viz. Sārasvata, Yogīśa, Meghavāha and Suvāhana.
english translation
tatrApi mama catvAro bhaviSyanti sutA yuge ॥ sArasvatazca yogIzo meghavAhaH suvAhanaH ॥ 30॥
hk transliteration by Sanscript