Ramayana
अमोघां तस्य शक्तिं च प्रददौ परमाद्भुताम् । परेण तपसा लब्धां जघ्निवाँल्लक्ष्मणं यया ॥ 7-12-21 ॥
And Maya bestowed upon him an unfailing and most wondrous spear, obtained through supreme austerities, with which Ravana later struck down Lakshmana.
english translation