Sutra:
288. "vittuciththar kEttiruppar" engiRapadiyE adhikArigaL niyathar.

Sri PBA Swami's Sarartha Deepikai:
Just as Andal sang "semmaiyudaiya thiruvarangar thAm paNiththa meymmaip peruvArththai vittusiththar kEttu iruppar", only those who listen to this and are steady in it are qualified for it.

The meaning of the verse is that, Periyazhvar would listen to the "mAmEkam sharaNam vraja" given by Lord Ranganatha on the chariot and be steady in following it.