Tanah itu suci dan tidak najis tanah bisa dipakai untuk tayamum, dan dapat menyucikan junub
Imam Bukhari : 326حَدَّثَنَا آدَمُ قَالَ حَدَّثَنَا شُعْبَةُ حَدَّثَنَا الْحَكَمُ عَنْ ذَرٍّ عَنْ سَعِيدِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ أَبْزَى عَنْ أَبِيهِقَالَ جَاءَ رَجُلٌ إِلَى عُمَرَ بْنِ الْخَطَّابِ فَقَالَ إِنِّي أَجْنَبْتُ فَلَمْ أُصِبْ الْمَاءَ فَقَالَ عَمَّارُ بْنُ يَاسِرٍ لِعُمَرَ بْنِ الْخَطَّابِ أَمَا تَذْكُرُ أَنَّا كُنَّا فِي سَفَرٍ أَنَا وَأَنْتَ فَأَمَّا أَنْتَ فَلَمْ تُصَلِّ وَأَمَّا أَنَا فَتَمَعَّكْتُ فَصَلَّيْتُ فَذَكَرْتُ لِلنَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّمَا كَانَ يَكْفِيكَ هَكَذَا فَضَرَبَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ بِكَفَّيْهِ الْأَرْضَ وَنَفَخَ فِيهِمَا ثُمَّ مَسَحَ بِهِمَا وَجْهَهُ وَكَفَّيْهِ
Narrated to us by Adam, Sa'd narrated to us Syu'bah, narrated to us Al Hakam from Dzar from Sa'id bin Abdurrahman bin Abza from his father, Sa'd 'A man came to Umar bin Al Khaththab, saying, "I am in a state of major impurity but found no water." Ammar bin Yasir Sa'dto Umar, "Do you not recall our journey together? You did not pray, but I rolled in dust and prayed. I told the Prophet, peace be upon him, and he Sa'd 'It suffices you to do thus.' He struck his palms on the ground, blew on them, and wiped his face and hands.'