Sayyiduna al-Asla' (may Allah be pleased with him), a man from Banu al-A'raj bin Ka'b, said: I used to serve the Prophet (peace and blessings be upon him), and he (peace and blessings be upon him) said to me: "O Asla', get up and show me how such-and-such is done." I said: O Messenger of Allah, I am in a state of major ritual impurity (janabah). He (peace and blessings be upon him) remained silent for a while, until Jibril (peace be upon him) came with the verse of tayammum, and he (peace and blessings be upon him) said: "O Asla', get up and perform tayammum." He said: Then he showed me how the Messenger of Allah (peace and blessings be upon him) had taught him tayammum: The Messenger of Allah (peace and blessings be upon him) struck the ground with his two palms, then shook them off, then wiped his face with them until he passed them over his beard. Then he put them back on the ground, wiped the ground with his two palms, rubbed one against the other, then shook them off, then wiped the outer and inner sides of his forearms.
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 872