"Do you remember when we were on a campaign, and I became Junub and rolled in the dust, then I came to the Prophet ﷺ 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.  

عَمَّارٌ أَتَذْكُرُ حَيْثُ كُنَّا فِي سَرِيَّةٍ فَأَجْنَبْتُ فَتَمَعَّكْتُ فِي التُّرَابِ فَأَتَيْتُ النَّبِيَّ ﷺ فَقَالَ إِنَّمَا يَكْفِيكَ هَكَذَا وَضَرَبَ شُعْبَةُ بِيَدَيْهِ عَلَى رُكْبَتَيْهِ وَنَفَخَ فِي يَدَيْهِ وَمَسَحَ بِهِمَا وَجْهَهُ وَكَفَّيْهِ مَرَّةً وَاحِدَةً  

"A man became Junub and came to 'Umar, may Allah be pleased with him, and said: 'I have become Junub and I cannot find any water.' He said: 'Do not pray.' 'Ammar said to him: 'Do you not remember when we were on a campaign and became Junub. You did not prayed, then I came to the Prophet ﷺ and told him that, and he said: 'This would have been sufficient for you.'" - (One of the narrators) Shu'bah struck his hands once and blew into them, then he rubbed them together, then wiped his face with them - ('Ammar said): "'Umar said something I did not understand." So he said: "If you wish, I shall not narrate it." Salamah mentioned something in this chain from Abu Malik, and Salamah added that he said: "Rather, we will let you bear the burden of what you tool upon yourself."  

أَجْنَبَ رَجُلٌ فَأَتَى عُمَرَ ؓ فَقَالَ إِنِّي أَجْنَبْتُ فَلَمْ أَجِدْ مَاءً قَالَ لاَ تُصَلِّ قَالَ لَهُ عَمَّارٌ أَمَا تَذْكُرُ أَنَّا كُنَّا فِي سَرِيَّةٍ فَأَجْنَبْنَا فَلَمْ نَجِدْ مَاءً فَأَمَّا أَنْتَ فَلَمْ تُصَلِّ وَأَمَّا أَنَا فَإِنِّي تَمَعَّكْتُ فَصَلَّيْتُ ثُمَّ أَتَيْتُ النَّبِيَّ ﷺ فَذَكَرْتُ ذَلِكَ لَهُ فَقَالَ إِنَّمَا كَانَ يَكْفِيكَ وَضَرَبَ شُعْبَةُ بِكَفَّيْهِ ضَرْبَةً وَنَفَخَ فِيهِمَا ثُمَّ دَلَكَ إِحْدَاهُمَا بِالأُخْرَى ثُمَّ مَسَحَ بِهِمَا وَجْهَهُ فَقَالَ عُمَرُ شَيْئًا لاَ أَدْرِي مَا هُوَ فَقَالَ إِنْ شِئْتَ لاَ حَدَّثْتُهُ وَذَكَرَ شَيْئًا فِي هَذَا الإِسْنَادِ عَنْ أَبِي مَالِكٍ وَزَادَ سَلَمَةُ قَالَ بَلْ نُوَلِّيكَ مِنْ ذَلِكَ مَا تَوَلَّيْتَ