Answered by Ustadh Tabraze Azam
Question: I have learnt that to perform wudu it is necessary to make the water flow over the body parts and merely wetting the limb by passing wet hands is not valid. Would pouring water over a small part of limb and then rubbing it with the hand enough to wash a limb?
Answer: Assalamu alaikum wa rahmatullah,
Washing is defined as making water flow on the limb such that it would normally drip off. It is not a condition that water flow over the entire limb as that would be unreasonably difficult, for obvious reasons.
When you pour water over a limb and then rub the entire area, you are considered to have washed it and thus, fulfilled the divine command.
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And Allah Most High alone knows best.
Checked & Approved by Shaykh Faraz Rabbani