http://www.hindupedia.com/en/Narasimha_Sthuthi_of_Prahlada
This prayer occurs in seventh Skanda, ninth chapter in slokas 8-50
This is a powerful prayer to Lord Narasimha for one's protection from the dark elements and demons within this material world.
नृसिंह स्तुति, Nrisimha Stuti
प्रहलाद स्तुति
പ്രഹ്ലാദ സ്തുതി