Ramanuja's quest for learning never ended. Perianambi told Ramanuja that in a nearby place called Thiurukottiyur, there lived a learned scholar who knows the meaning of the most sacred divine manthra and told Ramanuja to get it. Ramanuja attempted a lot of times and atlast in the eighteenth attempt, Thirukottiyur Nambi agreed to part with the Mantra and its meaning. But before that he got a promise from Ramanauja.
As per the promise, Ramanuja should not tell this to anyone as this mantra will take a person who listens to it directly to Vaikuntam and if it is told out to others Ramanuja will go to hell. Ramanuja with great excitement and anxiety got the mantra and started going back to SriRangam. While he was walking thinking of what he heard, all of a sudden he had a feeling and wanted this mantra to be known to one and all in the world so that everyone can reach Vaikundam. So Ramanuja went up to the nearby temple, raised his voice to the highest peak and called whosoever is interested to learn the divine mantra. He then initiated those who are eligible and interested to learn this mantra.
Thirukottiyur Nambi came to know of this and became very angry. He rushed to Ramanuja and enquired why he told this against the promise he had given. Ramanuja replied that by telling this Divine Manthra only he will go to hell but the entire humanity will reach Vaikuntam. This is what he needed and he did not mind going to hell alone. Listening to this Thirukottiyur nambi embraced Ramanuja. Thirukottiyur Nambi also made his son Sowmyanarayan as Ramanuja's disciple.
Source: Srivaishnavam