Thereafter, from the partial representation of Brahmā, the moon-god was born of them; from the partial representation of Viṣṇu, the great mystic Dattātreya was born; and from the partial representation of Śaṅkara [Lord Śiva], Durvāsā was born. Now you may hear from me of the many sons of Aṅgirā.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
सोमोऽभूद्ब्रह्मणोंऽशेन दत्तो विष्णोस्तु योगवित् । दुर्वासाः शङ्करस्यांशो निबोधाङ्गिरसः प्रजाः
somo'bhūdbrahmaṇoṃ'śena datto viṣṇostu yogavit | durvāsāḥ śaṅkarasyāṃśo nibodhāṅgirasaḥ prajāḥ
SB 4.1.33