Sunan An-Nasai, Chapter: The Book of Purification

"The Messenger of Allah (saw) sent Usaid bin Hudair and some other people to look for a necklace that Aisha had left behind in a place where she had stopped (while traveling). The time for prayer came and they did not have Wudu, and they could not find any water, so they prayed without Wudu. They mentioned that to the Messenger of Allah (saw), and Allah, the Mighty and Sublime revealed the verse of Tayammum. Usaid bin Hudair said: 'May Allah reward you with good, for by Allah, nothing ever happened to you that you dislike, but Allah makes it good for you and the Muslims.'" (Sahih)