Shiva Purana
अम्बरीषस्सुतस्तस्य विष्णुभक्तो बभूव सः ॥ यस्योपरि प्रसन्नोभूद्दुर्वासा ब्रह्मभक्तितः ॥ ३ ॥
Ambarīṣa was his son who was a devotee of Viṣṇu with whom the sage Durvāsas was much pleased due to his devotion for Brahmins.
english translation
ambarISassutastasya viSNubhakto babhUva saH ॥ yasyopari prasannobhUddurvAsA brahmabhaktitaH ॥ 3 ॥
hk transliteration by Sanscript