‏الصلاة : Hadeeth No:997 Anas reported: The Messenger of Allaah (sallAllaahu alayhi wa sallam) said: Observe moderation in prostration, and let none of you stretch out his forearms (on the ground) like a dog....

‏الحج : Hadeeth No:3190 This hadith has been narrated by Yabya b. Sa'id with the same chain of transmitters (and the words are):" Just as a furance removes impurity," but no mention is made of iron....