Where Did The Money Go?

One day, our dad called 5 of us and placed a piece of paper in our hand. He told that he has hidden all the money somewhere and the hints are written in those. He wanted to see who is the smartest among us. And individually, we started our hunt for the so called treasure.

My paper said "I am at the place where no one enters with their slippers on" I instantly understood that it must be a temple. But there are many in the town. So, I started from the nearby one. Then another situation occurred, where should I search for it in the entire temple. I went through all the accessible places but of no use. I was telling myself that its okay as it is just one...there are many, I could find my luck there. So, started hunting all the possible temples but after 8 hrs, my energy drained and with a fit of rage, I came back only to find my four sisters who were searching the house.

"Hey what happened? Did you have any luck?" , I called out but looking at those weared out faces, I understood that their case was similar to mine. Then I saw one of my sister running out of the house with a letter in her hand. We all gathered together to read.

"By the time you all read this letter, I would be gone far away from you and don't ever try to search for me. Hope you all had a great time hunting"

And it was signed by our father. And he left us with a question? Where did the money go? Did he hide it somewhere? Or did he take it with him?