In Bahishti Zewar it is written:

''It is mentioned in a Hadith: "That person's wudu is not complete who does not send salutations (durood) upon me." And in another Hadith, the time for sending durood is after completing the wudu.''
I would like to know these ahadith and whether they are sound. Also is there any narration that durood is to be read each time washing limb in wudhu ?