Incarnation of Dattatreya!

Verse 1.3.11: Sixth Incarnation. The story of Atri muni praying to Brahma, Vishnu and Shiva is given in the 3rd Canto of Srimad Bhgavatam. Here Srila Prabhupada comments that Atri muni was not advanced enough to understand who the Supreme Personality of Godhead is. That's why he wanted all three of them together as his son.

Dattatreya was born there of. He spoke about the soul and especially instructed Alarka, Prahlada and others.
The incarnation of Dattatreya is one of the different incarnations of the Lord. We think there are only 10, but there are many incarnations.

Although all these incarnations are either expansions of the Lord or expansions of expansions of the Lord, Krishna is the svayam bhagavan, the Supreme Personality of Godhead, from whom all these incarnations emerge.

And to understand this, chanting is very very important. Chanting, Srimad Bhgavatam class, serving devotees and Guru, the temples established by Srila Prabhupada, are all there just for us to be involved in bhakti and invoke transcendental love for Krishna within us. That's why we should take this opportunity and chant very very well.