This is often quoted in stories. When insulted keep quiet and daven for someone who needs a yeshua. Can you find me this source?

I know that mikvah immersion and ritual washing is required, but what about other bodily hygiene, shaving, teeth, house order, hair and all other hygienically addressable aspects of a modern human? Opinions? I'd love to find references to the importance of hygiene and even better citations of exa...