The great sage Atri prayed for offspring, and the Lord, being satisfied with him, promised to incarnate as Atri’s son, Dattātreya [Datta, the son of Atri]. And by the grace of the lotus feet of the Lord, many Yadus, Haihayas, etc., became so purified that they obtained both material and spiritual blessings.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
अत्रेरपत्यमभिकाङ्क्षत आह तुष्टो दत्तो मयाहमिति यद्भगवान् स दत्तः । यत्पादपङ्कजपरागपवित्रदेहा योगर्द्धिमापुरुभयीं यदुहैहयाद्याः
atrerapatyamabhikāṅkṣata āha tuṣṭo datto mayāhamiti yadbhagavān sa dattaḥ | yatpādapaṅkajaparāgapavitradehā yogarddhimāpurubhayīṃ yaduhaihayādyāḥ
SB 2.7.4