Salam kernay ki naikiyan ((Abu Dawud ~ Book #41, Hadith #5176))

Narrated Imran ibn Husayn (Radi'Allahu anhu):

A man came to the Prophet (SallAllahu alaihi wasallam)
and said:
Peace be upon you!
He (SallAllahu alaihi wasallam)

responded to his salutation.
He then sat down.
The Prophet (SallAllahu alaihi wasallam) said:
'Ten' (i.e. ten good deeds recorded for him).

Another man came and said:
Peace and Allah's mercy be upon you!
He (SallAllahu alaihi wasallam)

responded to his salutation
when he sat down. He (SallAllahu alaihi wasallam) said: 'Twenty' (i.e. twenty good deeds recorded for him) .

Another man came and said:
Peace and Allah's mercy and blessings be upon you!
He (SallAllahu alaihi wasallam) responded to him
and said when he sat down:
'Thirty' (i.e. thirty good deeds recorded for him).

(Abu Dawud ~ Book #41, Hadith #5176)