Kindness that earns wealth

Kaka comes from a poor family but whenever he goes to schoool coukd first see an old man who use to live near their village. He could wake up and help his old man get to school because he wanted to know how to read.
The old man attended school at Kaka's school for two days and told Kaka that he is very old but he want to do him some favour. He told Kaka the man that i worked for doesn't have any children but very rich and he is searching for a good clever bright boy who can inherit his wealth. I was sent to look for someone even i myself doesn't have children but i have been watching you for a long time. Due to your kindness the man was touched  and decided to give Kaka his wealth. Now kaka and his family are now rich and respected by everyone and now he is helping other needy in the society

Location: Kilgoris, Transmara, Kenya