The Source

[Abhidevananda]

There was a monastery in a certain place. The monks residing there went
out daily to beg their food. One day a monk, while out for his alms,
saw a landlord beating a man mercilessly. The compassionate monk
stepped in and asked the landlord to stop. But the landlord was filled
with anger and turned his wrath against the innocent monk. He beat the
monk till he fell unconscious on the ground. Someone reported the
matter to the monastery. The monks ran to the spot and found their
brother lying there. Four or five of them carried him back and laid him
on a bed. He was still unconscious. The other monks sat around him sad
at heart; some were fanning him. Finally someone suggested that he
should be given a little milk to drink. When it was poured into his
mouth he regained consciousness. He opened his eyes and looked around.
One of the monks said, "Let us see whether he is fully conscious and
can recognize us." Shouting into his ear, he said, "Revered sir, who is
giving you milk?" "Brother," replied the holy man in a low voice, "he
who beat me is now giving me milk."
from "Tales and Parables of Sri Ramakrishna"