Shiva Purana
दारां तस्य तु विषये विश्वामित्रो महातपाः ॥ संत्यज्य सागरानूपे चचार विपुलं तपः ॥ ५५॥
Viśvāmitra of great penance abandoned his wife in that land and performed extensive penance in the marshy foreshore of the ocean.
english translation
dArAM tasya tu viSaye vizvAmitro mahAtapAH ॥ saMtyajya sAgarAnUpe cacAra vipulaM tapaH ॥ 55॥
hk transliteration by Sanscript