Shiva Purana
ततः प्रसन्नो भगवाच्छंकरो भक्तवत्सलः॥ आविर्बभूव पुरतो द्रोणस्य मुनिसत्तम॥ ७॥
O excellent sage, then the delighted lord Śiva, favourably disposed to his devotees, appeared in front of Droṇa.
english translation
tataH prasanno bhagavAcchaMkaro bhaktavatsalaH॥ AvirbabhUva purato droNasya munisattama॥ 7॥
hk transliteration by Sanscript