Premanand Maharaj Ji
What is the greatest seva of a saint, and what is its fruit?
Obeying the saint's command
Obeying a saint's command is the greatest seva, not feeding him sweets. Its fruit is Bhagwat prapti, attaining Bhagwan.
This is the greatest seva: obeying the saint's command is the greatest seva, not feeding him rabdi and rasgulla.