I was in a gathering with the Prophet ﷺ, Abu Bakr, Umar, Uthman, Ali, and others. The Prophet ﷺ took a group of pebbles in his hand and we all heard the stones praising Allah. He passed them to Abu Bakr, and they continued praising Allah in his hand, and we all heard it; then to Umar, then to Uthman, and it was the same each time. After the Prophet ﷺ left and we picked up those same stones, we could hear nothing from them.