Shiva Purana
वैशाखे चैव संप्राप्ते सप्तम्याश्च दिने शुभे ॥ सितेपक्षे सदा गंगा ह्यायाति द्विजसत्तम ॥ ६०॥
O excellent brahmin, in the month of Vaiśākha on the auspicious seventh day in the bright half, Gaṅgā comes here always.
english translation
vaizAkhe caiva saMprApte saptamyAzca dine zubhe ॥ sitepakSe sadA gaMgA hyAyAti dvijasattama ॥ 60॥
hk transliteration by Sanscript