In Bahishti Zewar it is written:
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 ?''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.''