“It hath been enjoined upon you to pare your nails, to bathe yourselves each week in water that covereth your bodies, and to clean yourselves with whatsoever ye have formerly employed. Take heed lest through negligence ye fail to observe that which hath been prescribed unto you by Him Who is the Incomparable, the Gracious.“

– Bahá’u’lláh, The Kitáb-i-Aqdas