'If one of you sneezes and praises Allah, it is the right of every Muslim who hears him to say 'yarham kal-laah.' (Bukhari) *One should say Yarham kal-laah' to the one who sneezes after he says 'Alhamdulilah.' The Prophet () said:
'If one of you sneezes and then says: 'alhamdulilah' then say 'Yarham kal'laah' (Muslim)
*If someone forgets to say 'Alhamdulilah' after they sneeze, some scholars say that they should be reminded. Other scholars say that they should not be reminded for the Prophet () did not remind those who did not say 'Alhamdulilah'.