How to change staying here every day in rainy days?

There is such a joke: one day, a poor scholar went to a friend's house to be a guest. The master feels sorry for him and doesn't want to raise him, but it's hard to talk. Just then it began to rain, and the host wrote on the paper the words "Keep guests in rainy days and accompany me every day" without punctuation. After reading it, the poor scholar picked up a pen and punctuated this sentence. When the master saw it, he had to stay. If it rains, I will stay for a few days, but I will stay for a few days. Scholar: If it rains, will it stay for me? Stay.