‏الصلاة : Hadeeth No:771 'Ubada b. as-Samit reported from the Prophet of Allaah (sallAllaahu alayhi wa sallam ): He who does not recite Fatihat al-Kitab is not credited with having observed the prayer....

‏الزهد والرقائق‏ : Hadeeth No:7127 Abu Burda reported: I visited Abu Musa, as he was in the house of the daughter of Fadl b. 'Abbas. I sneezed but he did not respond to it (by saying): Allaah may have mercy upon you. Then she sneezed and he (Fadl b. 'Abbas) said: May Allaah have mercy upon you. I came back to my mother and informed h...