To perform dry ablution one must first have the right intention and say “in the name of God” then strike the ground with his both hands, blow the dust off them and wipe his face and hands up to the wrist, only one time.
How it is done
To perform dry ablution, one needs to have the right intention, then say ‘in the name of Allah’, then strike the ground with both hands once, blow the dust off them or shake them, then wipe over one’s face and hands up to the wrists. Ammar reports a hadith in which the Prophet (peace be upon him) is quoted to have said:
‘Tayammum is done with one strike for both one’s face and hands.’
Related by Ahmad, hadith No. 183,191; Abu Dawud, hadith No. 327; al-Tirmidhi, hadith No. 144; al-Nassa’i, in Al-Sunan al-Kubra, hadith No. 302
:The Prophet (peace be upon him) also said to Ammar
‘It was sufficient for you to do like this:” He struck on the ground with his hands, then shook them, then wiped with them the back of his hand with his left hand, then wiped his face with both hands.’
Related by al-Bukhari, hadith No. 347; Muslim, hadith No. 368