At that juncture...
The Almighty Allah has given me the keys of Fars. And by Allah I can see the white palaces of Madayan. When he hit the third time, the whole stone broke. The Holy Prophet (S) said: Allahu Akbar. The Almighty Allah has give the keys of Yemen to me and I can see the gates of Sana.
Kulaini has narrated through authentic chains of narrators from Imam Ja’far Sadiq (a.s.) that the Holy Prophet (S) took the pickaxe either from Amirul Momineen (a.s.) or Salman and gave a hit, with which the stone broke into three pieces. He said: With this same blow the treasures of Caesar and Kisra have opened for me.
Abu Bakr and Umar said: “Because of fear, we can hardly go out to relieve ourselves and he is promising the kingdoms of Rum and Iran.” Shaykh Tabarsi has narrated that when the Holy Prophet (S) drew the line for the trench, he allotted four feet of digging to every man. There was an argument among the Muhajireen and Ansar with regard to Salman, because he was a public figure. The Muhajireen used to say that he was from them and the Ansar claimed that he belonged to them.
The Holy Prophet (S) said: “No, Salman is from us, Ahlul Bayt (a.s.). Thus Ali bin Ibrahim narrated further that Jabir says: That stone was pulverized into small particles and I felt that the Prophet was hungry. I said: “O Prophet, is it possible for you to take breakfast at my home?” he asked what I was having and I told him that I had a kid and a Saa of barley. He said: “All right, go and prepare whatever you have.
Jabir says that he went home and explained the matter to his wife who grinded the barley while he slaughtered the goat. When the bread and meat was ready Jabir went to the Prophet and said: “May my parents be sacrificed on you, O Messenger of Allah (S), food is ready, please come and also take whoever you like.” The Holy Prophet (S) stood on the edge of the trench and announced: O Muhajireen and Ansar, Jabir has invited all of you for dinner.” There were 700 persons present at that time.