It is narrated from Hazrat Anas bin Malik (may Allah be pleased with him) that once I was playing with children, when the Prophet (peace and blessings be upon him) came and greeted us with salam. Then he took my hand and sent me on an errand, and he himself sat in the shade of a wall until I returned and delivered the message with which the Prophet (peace and blessings be upon him) had sent me. When I reached home, Umm Sulaim (may Allah be pleased with her) (my mother) asked, "Why were you so late?" I told her that the Prophet (peace and blessings be upon him) had sent me on an errand. She asked, "What was the errand?" I said, "It is a secret." She said, "Then protect the secret of the Prophet (peace and blessings be upon him)." Thus, after that, I never disclosed it to anyone.