Verse 9

द्वावेतौ राम सुखितावन्तश्चेत्परिशीतलौ ।अन्तःशीतलता या स्यात्तदनन्ततपःफलम्

In plain words

Both of these, Rāma, are happy, provided they are cool through and through within; and whatever inner coolness there is, that is the fruit of tapas without end.