The Quranic text states:
فَلَمْ تَجِدُوا مَاءً فَتَيَمَّمُوا صَعِيدًا طَيِّبًا
Meaning: If you do not find water, perform tayammum with pure earth.
Hanafi reasoning treats tayammum as a substitute purification that persists until nullified; the alternative legal analysis restricts the permission more narrowly to an obligatory prayer.
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Tayammum Materials, Intention, Nullifiers, and Searching for Water
The Quranic text states:
فَلَمْ تَجِدُوا مَاءً فَتَيَمَّمُوا صَعِيدًا طَيِّبًا
Meaning: If you do not find water, perform tayammum with pure earth.
Hanafi reasoning treats tayammum as a substitute purification that persists until nullified; the alternative legal analysis restricts the permission more narrowly to an obligatory prayer.