(5) باب التَّيَمُّمُ لِلْوَجْهِ وَالْكَفَّيْنِ
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.)"
Reference: Sahih al-Bukhari 340
In-book reference: Book 7, Hadith 7
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 7, Hadith 336