Shiva Purana
शिवस्तुष्टमना आसीदर्जुनः सुखमागतः॥ दैत्यस्य च तदा दृष्ट्वा क्रररूपं च तौ तदा॥ ५०॥
On seeing the cruel form of the Daitya, Śiva was glad and Arjuna was happy.
english translation
zivastuSTamanA AsIdarjunaH sukhamAgataH॥ daityasya ca tadA dRSTvA krararUpaM ca tau tadA॥ 50॥
hk transliteration by Sanscript