Mishkat al-Masabih
Mishkat al-Masabih 528
وَعَن عمار قَالَ: جَاءَ رَجُلٌ إِلَى عُمَرَ بْنِ الْخَطَّابِ فَقَالَ: إِنِّي أَجْنَبْتُ فَلَمْ أُصِبِ الْمَاءَ فَقَالَ عمار بن يَاسر لعمر بن الْخطاب أَمَا تَذْكُرُ أَنَّا كُنَّا فِي سَفَرٍ أَنَا وَأَنْتَ فَأَمَّا أَنْتَ فَلَمْ تُصَلِّ وَأَمَّا أَنَا فتمعكت فَصليت فَذكرت للنَّبِي صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسلم إِنَّمَا كَانَ يَكْفِيكَ هَكَذَا فَضَرَبَ النَّبِيُّ صَلَّى الله عَلَيْهِ وَسلم بكفيه الأَرْض وَنفخ فيهمَا ثمَّ مسح بهما وَجْهَهُ وَكَفَّيْهِ. رَوَاهُ الْبُخَارِيُّ وَلِمُسْلِمٍ نَحْوُهُ وَفِيهِ قَالَ: إِنَّمَا يَكْفِيكَ أَنْ تَضْرِبَ بِيَدَيْكَ الْأَرْضَ ثمَّ تنفخ ثمَّ تمسح بهما وَجهك وكفيك
ʿAmmār reported that a man came to ʿUmar ibn al-Khaṭṭāb and said: ‘I am in a state of sexual impurity and cannot find water.’ ʿAmmār said to ʿUmar: ‘Do you remember when you and I were traveling? You did not pray, while I rolled in the earth and prayed. I mentioned it to the Prophet, and he said: “It would have been enough for you to do this.”’ The Prophet struck the ground with his palms, blew into them, then wiped his face and his hands with them.
Al-Bukhārī transmitted it. Muslim has a similar version in which the Prophet said: ‘It is enough for you to strike the ground with your hands, blow, then wipe your face and hands with them.’