Language:
كتاب التيمم
7  
Rubbing hands and feet with dust (Tayammum)
(5)
Chapter: Tayammum is for the hands and the face
(5)
باب التَّيَمُّمُ لِلْوَجْهِ وَالْكَفَّيْنِ
Sahih al-Bukhari 340

Narrated `Abdur Rahman bin Abza:

that while he was in the company of `Umar, `Ammar said to `Umar, "We were in a detachment and became Junub and I blew the dust off my hands (performed the rolling over the earth and prayed.)"

حَدَّثَنَا سُلَيْمَانُ بْنُ حَرْبٍ، قَالَ حَدَّثَنَا شُعْبَةُ، عَنِ الْحَكَمِ، عَنْ ذَرٍّ، عَنِ ابْنِ عَبْدِ الرَّحْمَنِ بْنِ أَبْزَى، عَنْ أَبِيهِ، أَنَّهُ شَهِدَ عُمَرَ وَقَالَ لَهُ عَمَّارٌ كُنَّا فِي سَرِيَّةٍ فَأَجْنَبْنَا، وَقَالَ تَفَلَ فِيهِمَا‏.‏
Reference : Sahih al-Bukhari 340
In-book reference : Book 7, Hadith 7
USC-MSA web (English) reference : Vol. 1, Book 7, Hadith 336
  (deprecated numbering scheme)