Substitution for wuduí and/or ghusl, ablutions with earth, sand etc.
Useful information: Performance of tayammum on earth, sand, a lump of clay or a stone is in order, but the recommended precaution is that if earth is available tayammum should not be performed on anything else. In case earth is not available it should be performed on sand or a lump of clay and in the absence of that on a stone.
METHOD OF PERFORMING TAYAMMUM IN LIEU OF BATH OR ABLUTIONS
708. The following 4 things are obligatory regarding tayammum which is performed in lieu of taking ceremonial bath or performing ablutions (i) Intention (ii) Striking both the palms on the object on which tayammum is valid. (iii) Wiping or stroking with the palms of both the hands the entire forehead and its two sides commencing from the spot where the hair of one's head grow up to the eyebrows and above the nose and as a precautionary measure the hands should also stroke the eyebrows. (iv) The palm of the left hand should be wiped on the entire back of the right hand and thereafter the palm of the right hand should wipe the entire back of the left hand.