The story revolves around two friends who were walking in the middle of the desert. At some point in their journey, they quarreled greatly, and one of them slapped the other in the face. The one who was beaten felt intense pain and sadness, but without saying a word, he wrote on the sand: - “Today my best friend slapped me on the face.”

Source

Then they continued their journey until they reached a beautiful oasis, and decided to bathe in the lake of the oasis, but the young man who had been slapped previously got stuck in a swamp of mud and began to drown. So his friend hurried to him and saved him. At the time, the young man who was about to drown on a large rock wrote the following sentence: - “Today my best friend saved my life.” Here, the friend who slapped him and rescued him asked him: - "After I hurt you, you wrote on the sand, and now you are writing on the rock. Why is that?" The young man replied: - "When someone hurts us, we have to write his abuse on the sand so that the winds of forgetfulness sweep it away. But when someone offers us a favor, we must dig it on the rock so that we never forget it and the wind does not erase it at all."

Lesson: Be tolerant and don't forget those who did you a favor. Do not appreciate what you have, but rather what people you have around you