Earth

184. The earth, with three conditions, makes the sole of one's feet and shoes Pak which has become Najis because of walking on Najis floor, and as per obligatory precaution, with regards to the Najasat which has reached the sole or shoes from outside, one should not only walk on the earth to make his sole of feet or shoes Pak but should also clean it up.

The earth makes the sole of one’s feet and shoes Pak with the following three conditions:

The earth should be Pak.
The earth should be dry.
If the essential Najasat, like blood or urine, or something which has become Najis, like Najis clay, is stuck on the sole of a foot, or a shoe, it will be Pak only if it is cleared by walking on earth, or by rubbing the foot of the shoe against it. However, the earth should consist dust or stone and things like that; which means walking on carpet, mats, and green grass will not make the sole of feet or shoes Pak, and as per precautionary measures, walking on the floor on which bricks or woods or plasters or tars are laid will not make the sole of feet or shoes Pak.

185. Whether walking over a tar road, or a wooden floor, will make the Najis sole of feet and shoes Pak or not, is a matter of Ishkal.

186. In order to make the sole of one's feet or shoe Pak, it is better that one should walk a distance of at least fifteen arm-lengths or more, even if the Najasat disappears by walking a lesser distance, or by rubbing one's foot on earth.

187. It is not necessary that the Najis sole of one's feet or shoe be wet. They become Pak by walking on earth, even if they are dry.

188. When the Najis sole of one's foot or shoe becomes Pak by walking on earth, the parts adjacent to it, which are usually blotched with mud, becomes Pak.

189. If a person moves on his hands and knees, and his hands or knees become Najis, it becomes Pak by such movement. Similarly, the end of a stick, the bottom of an artificial leg, the shoe of quadruped will also become Pak.

190. If after walking, the smell or colour of the Najasat, or its invisible particles, remains in the sole of the feet or the shoe, there is no harm in it, although the recommended precaution is that one should walk so much that these things also disappear.

191. The inner part of the shoe or the part which does not come in contact of earth while walking does not become Pak by walking. Similarly, the purification of the inner part of the socks is a matter of Ishkal.