Answered by Ustadh Tabraze Azam
Question: As salam alaykum,
Is it obligatory to wash the area under the chin for my wudu to be valid?
Answer: Wa alaikum assalam wa rahmatullahi wa barakatuh,
I pray that this message finds you well, insha’Allah.
No, it is not necessary to wash underneath the chin, namely the area which is not considered to be part of the face, because the command to wash applies only to the face itself.
However, the jurists define the limits of the face as being from the top of the forehead till the bottom of the chin, and from earlobe to earlobe. Thus, it is necessary to wash this area in its entirety, without being lax or excessive.
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And Allah alone knows best.
Checked & Approved by Shaykh Faraz Rabbani