The Prophet's care for the special needs

It is narrated on the authority of Anas (may Allah be pleased with him) that a woman, somewhat mentally defected, said, " O Messenger of Allah! I have a need that I want you to meet. He responded, "O mother of so and so, choose the way you like to walk in so that I may know your need and meet it."He walked with her in some route until she had her need fulfilled (Muslim).

http://www.onislam.net/english/shariah/muhammad/a-mercy-for-all/442066.html