The Connection Between Du'ar and Barakah

Ibrahim al-Haz-salam is being heard thousands of years later and people are responding la beq al-la-ham-la beq. That's the barakah the blessing of the du'ar of Ibrahim al-H Haz-salam so what's the connection here between du'ar and this specific concept of barakah? The story goes that Ibrahim finds a woman in the house of Isma'i that is his first wife from the people of Jourham who surrounded them and asked her how she was doing without introducing himself  and she thought he was just an old wayfare. When your husband comes home give him Salaam