Shiva Purana
पुरा मम गुरुर्व्यासः पराशरमुनेः सुतः । तपश्चचार संभ्रांतः सरस्वत्यास्तटे शुभे ७ ।
Long ago, my preceptor Vyāsa, the son of Sage Parāśara, performed penance on the bank of the river Sarasvatī with some mental agitation.
english translation
purA mama gururvyAsaH parAzaramuneH sutaH । tapazcacAra saMbhrAMtaH sarasvatyAstaTe zubhe 7 ।
hk transliteration by Sanscript