Sutra:
130. mathuppAlE iruvar sErththiyum nithyam engiRathu.

Meaning:
Through the "madh", that comes after the Sri, it is shown that the togetherness of the Divine Couple is eternal.

Sri PBA Swami's Sarartha Deepikai:
In the term "Srimadh", the first part Sri has been explained thus far. Now the "madh" which is joined with the Sri is explained.

The "madh" is taken as showing the eternal togetherness of the divine couple.