As posted by Yitz Grossman.
During the Second World War, there was a little girl in Jerusalem who was already two and a half years old and still unable to walk. Her younger sister was showing signs of starting to walk, while she herself made no progress whatsoever. The parents were very worried and took her to the best doctors, but were unable to find a remedy. One doctor was especially pessimistic and said, “When hair grows on the palm of my hand, this little girl will walk.”
The great tzaddik, Rabbi Shlomo of Zehvil, lived in Jerusalem at that time and the girl’s mother decided to go to the rabbi and implore him to pray for the child. As it was wartime, food was very scarce, and everything was rationed. Since it was customary for one to bring a gift to a chassidic rabbi when one came to see him, the mother did the same, despite her dire situation. In the market she bought some lentils, flour, and dried fruit and brought the food to the rabbi as a present. Then she begged him to bless her daughter with a complete recovery.
The rabbi heard her story and that she was a descendant of the famous Rabbi of Brezhen. But his response was, “I would like to help you, but there is nothing I can do.”
When the mother heard this, she understood the severity of the situation, since even this great tzaddik was unable to abolish the decree in heaven against her daughter. She began to sob hysterically and did not stop imploring him to bless the child. “Yes, you can help me,” cried the mother. “A tzaddik’s prayers are always answered.”
The rabbi thought for a while and then he said to her, “There is a known method of getting your prayers answered, and that is to go to the Kosel for forty consecutive days.”
She answered, “Rebbe, how can I, a young woman with many small children, go forty days to the Kosel?” Her responsibilities to her family made it impossible for her to leave the house every day.
“But what can I do?” replied the rabbi.
“Go instead of me!” pleaded the mother.
The rabbi thought for a minute and said, “All right, I agree to go for you.” With this he sent her home with a blessing.
When she came home she told her husband about her visit to the rabbi. Exactly on the fortieth day, when the child was sitting on a chair, and her younger sister was crawling near her on the floor, she suddenly started walking normally, just like any other child. From that day on she progressed like a normal child. She later grew up, got married, and had a large family.