‘Ammar b. Yasir used to tell that when they were with God’s messenger they wiped themselves with earth for the dawn prayer, striking the palms of their hands on the earth, then wiping their faces once. They struck the palms of their hands again on the earth and wiped their arms completely up to the shoulders, and up to the armpits on the inside of their arms.
Abul Juhaim b. al-Harith b. as-Simma said that once when coming from the direction of Bi’r Jamal* the Prophet was met by a man who saluted him, but the Prophet did not respond to his salutation till he went towards the wall and wiped his face and his hands. Then he responded to his salutation.
*A well in Medina.
Two men went out on a journey, and when the time for prayer came, having no water with them, they performed ablution with good earth and then prayed. Immediately afterwards they found water, and one of them repeated the prayer with ablution, but the other did not. When they came to God’s messenger sometime afterwards they mentioned that, and he said to the one who did not repeat the prayer, "You have observed the sunna and your prayer was enough for you." To the one who had performed ablution and repeated the prayer he said, "You will have a twofold reward.”
Abu Dawud and Darimi transmitted it, and Nasa’i transmitted something similar.
He and Abu Dawud also transmitted it from ‘Ata’ b. Yasar in mursal form.