Sayyiduna Rasoolullah (sallal laahu alaihi wasallam) taught this Durood Shareef to Hazrat Qabisabin Mukharib(radi Allahu anhu) on a particular occasion. If any Muslim man or woman recites this DuroodShareef once, thenAllah Taala opens all the four Doors of Heaven for him. The reciter is at a liberty to enter intoHeaven from any doorhe chooses.Hazrat Qabisa (radi Allahu anhu) used to only recite this Durood. The Durood is the following:ALLAHUMMA SALLI ALA SAYYIDINA MUHAMMADIW WA ALA AALI SAYYIDINAMUHAMMADIW WAHDINI MIN INDIKA WA AFYID ALAYYA MIN FADLIKA WA ANSHUR ALAYYA MIR RAHMATIKAWA ANZILALAYYA MIM BARAKAATIKA."O Allah! Shower your blessings on our Master Muhammad, and his Family, and give meexclusive guidance andshower grace and favours, and spread your kindness on Muhammad and favours on him."