‏الطهارة : Hadeeth No:541 Abu Huraira said: When anyone amongst you wakes up from sleep, he must not put his hand in the utensil till he has washed it three times, for he does not know where his hand was during the night....

‏اللباس والزينة‏ : Hadeeth No:5170 Anas reported that Allaah's Messenger (sallAllaahu alayhi wa sallam) granted concession, or Zubair b. Awwam and 'Abd Al-Rahman b. Auf were granted concession, for the wearing of silk because of the itch that they both had....