Shiva Purana
श्रविष्ठाख्ये तु नक्षत्रे प्रौष्ठपद्यां ततः परम् ॥ प्रोक्षयेच्च जलक्रीडां पूर्वाषाढाश्रये दिने ॥ १० ॥
After that, in the constellation Śraviṣṭhā, on the day of Prauṣṭhapada, Sprinkle the water sports on the day of the Eastern Ashadha.
english translation
zraviSThAkhye tu nakSatre prauSThapadyAM tataH param ॥ prokSayecca jalakrIDAM pUrvASADhAzraye dine ॥ 10 ॥
hk transliteration by Sanscript