The wiping of the face must precede the wiping of the hands; if reversed inadvertently, it is not valid according to the school of thought.
There is no specific order required for taking the dust for the limbs; if one strikes his hands on the ground, it is permissible to wipe the face with his right hand, then his right hand with his left.
If one experiences an impurity after taking the dust but before wiping the face, the taking is invalidated, and he must take it again.
Among its Sunnahs: saying 'Bismillah', preferring the right over the left, continuity, lightening the dust if it is excessive, and not repeating the wiping.
It is recommended not to lift the hand from the limb until its wiping is completed, and to remove the ring in the first strike.
It must be removed in the second strike because the dust does not enter beneath it.
It is sufficient to apply the dust to the face and hands by any means possible, whether by hand, cloth, or wood.
It is not required to apply dust to the roots of the fine hairs, but it should reach the apparent part of the beard.
If impurity occurs after tayammum, it does not invalidate it according to the school of thought.
However, wiping the impure limb is not valid until its impurity is removed.
