 बहुविघ्नं तपो नित्यं दुश्चरं चैव राघव।तेन शापं न मुञ्चामो भक्ष्यमाणाश्च राक्षसैः।। 
 O Rama it is difficult to perform penance which is ever full of obstacles. Therefore, we do not pronounce curses even if eaten up by demons. 