Whoever

One time Ramanujacharya was begging to the Lord you are the sarnagat vatsal, please accept me. 

The Lord said, alright I accept you. 

Then Ramanujacharya said, can you also please accept all the living beings. 

Earlier the Lord had immediately replied, but later he thoughtfully spoke thus – 

whoever Oh Ramanujacharya will be grateful for all the work you have done to establish religion, if they will understand your work and admire it, to such people I will accept. Not directly.  

Sri Vaishnava

http://www.srivaishnava.in/

Putra-Kameshti Yagna

Ramanuja’s father Asoori Sarvakrati Kesava Dikshitar performed the Putra Kameshti Yagna to pray for a son. Lord Parthasarathy himself appeared in his dream and announced that He Himself would be born as his son under the name of Ramanuja and would help to spread the word of God.

Yagna Done Earlier
http://ramayanainfo.blogspot.com/2012/02/shanta-slokas-map.html