Shiva Purana
विष्णोरंशात्स्त्रियान्तस्यामत्रेर्दत्तो व्यजायत ॥ संन्यासपद्धतिर्येन वर्द्धिता परमा मुने ॥ २६ ॥
O sage, the part of Viṣṇu was born of that lady, wife of Atri, as Datta by whom the great path of renunciation was expanded.
english translation
viSNoraMzAtstriyAntasyAmatrerdatto vyajAyata ॥ saMnyAsapaddhatiryena varddhitA paramA mune ॥ 26 ॥
hk transliteration by Sanscript