Sunan an-Nasa'i, Book 1, Hadith 319 (In-Book) ⓘ

It was narrated from Ibn 'Abdur-Rahman bin Abza, from his father, that a man asked 'Umar bin Al-Khattab about Tayammum and he did not know what to say. 'Ammar said: "Do you remember when we were on a campaign, and I became Junub and rolled in the dust, then I came to the Prophet and he said: 'This would have been sufficient.'" (One of the narrators) Shu'bah struck his hands on his knees and blew into his hands, then he wiped his face and palms with them once.

أَخْبَرَنَا عَمْرُو بْنُ يَزِيدَ، قَالَ حَدَّثَنَا بَهْزٌ، قَالَ حَدَّثَنَا شُعْبَةُ، قَالَ حَدَّثَنَا الْحَكَمُ، عَنْ ذَرٍّ، عَنِ ابْنِ عَبْدِ الرَّحْمَنِ بْنِ أَبْزَى، عَنْ أَبِيهِ، أَنَّ رَجُلاً، سَأَلَ عُمَرَ بْنَ الْخَطَّابِ عَنِ التَّيَمُّمِ، فَلَمْ يَدْرِ مَا يَقُولُ فَقَالَ عَمَّارٌ أَتَذْكُرُ حَيْثُ كُنَّا فِي سَرِيَّةٍ فَأَجْنَبْتُ فَتَمَعَّكْتُ فِي التُّرَابِ فَأَتَيْتُ النَّبِيَّ صلى الله عليه وسلم فَقَالَ ‏ "‏ إِنَّمَا يَكْفِيكَ هَكَذَا ‏" ‏ ‏.‏ وَضَرَبَ شُعْبَةُ بِيَدَيْهِ عَلَى رُكْبَتَيْهِ وَنَفَخَ فِي يَدَيْهِ وَمَسَحَ بِهِمَا وَجْهَهُ وَكَفَّيْهِ مَرَّةً وَاحِدَةً ‏.‏