On three occasions one is prayed for in the plural although he is singular. The first occasion is when one sneezes. They tell him ‘Yarhamakumullah that means ‘May God have Mercy upon you’ as if someone else is with him. The second occasion is when one greets others. They return his greeting by saying ‘Assalumalaykum as if others are with him. The third occasion is when one prays for someone else to be healed and says ‘Afakumullah as if he is praying for more than one person.”The compiler of the book - may God increase his honor - said, “They say ‘Yarhamakumullah to the opponents once they sneeze which refers to the two appointed accompanying angels, but say ‘Yarhamakullah to a believer when he sneezes.”