Srivaishnavas climbing from Srirangam were weary when a young brahmachari served them temple prasāda. He named himself Madhurakavidāsa, disciple of Ananthalvan, and recited two taniyans when they tested him — one on Ananthalvan’s qualities, one binding him to Ramanuja’s lotus feet.
At the entrance Ananthalvan received the party and was bewildered. He had sent neither boy nor prasāda. The assembly understood: Srinivasa Himself had walked the path, taken the name Madhurakavidāsa, and declared Ananthalvan equal to the feet of Ramanuja. Those two verses became the taniyans of the Acharya.
अखिलात्मगुणावासम् अज्ञानतिमिरापहम् । आश्रितानां सुशरणं वन्देऽनन्तार्य देशिकम् ॥
Akhilātmaguṇāvāsam ajñānatimirāpaham Āśritānāṃ susaraṇaṃ vande Anantāryadeśikam
I bow to Acharya Anantharya, dwelling of every noble quality, who dispels the darkness of ignorance, the sure refuge of those who take shelter in him.
First taniyan — recited by Srinivasa as Madhurakavidāsa