He already paid

He has not walked or talked for years. He is always on the bed. The only movement you notice is in one eye. Just barely. He breathes, so he is alive.
Then one day, the inevitable. A bed sore. It was deep and infected.
The world was locked down on account of the corona pandemic. But he had to be taken to the hospital. The wound required cleaning and dressing. The doctor hoped to discharge him after a week.
The hospital was under pressure. His condition was stable enough. The wound was healing, but slowly. One of the nurses agreed to come home every day for the dressing. For 15 days. So, he was discharged on the third day.
The nurse arrived in the afternoon the next day. She did a good job. Patiently. With great care.
As she was about to leave, I asked her about her fees. That was when I noticed the tears in her eyes.
“Years ago, we used to meet almost every evening. He would be on his walk and I would be returning from the hospital. One day he stopped to talk. He was amazed that I was walking a long distance back from the hospital. Maybe I should try a scooter, he had suggested. That became a routine. We would pause for a chat. He would always say something funny. Thanks to that I would reach home smiling, the day’s tension forgotten. I wish I could return the favor now. But he does not know me, cannot hear me.”
She wiped her tears and opened the gate. She paused. “No, you don’t have to pay me anything. He already paid, a long time ago.”
(Based on a true incident.)