‏الصلاة : Hadeeth No:1294 Khabbab reported: We complained to the Messenger of Allaah (sallAllaahu alayhi wa sallam) (the difficulty of) saying prayer on the intensely heated (ground or sand), but he paid no heed to our complaint....

‏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....