Narated By Abu Said Al-Khudri:

Allah's Apostle (p.b.u.h) said, "The taking of a bath on Friday is compulsory for every male (Muslim) who has attained the age of puberty."

Sahih Bukhari Volume 002, Book 013, Hadith Number 004.

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"Nay! man is evidence against himself. Though he puts forth his excuses." Holy Qur'an (75:14-15)