It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) ordered a trench to be dug around Madinah. Meanwhile a group came to him (peace and blessings be upon him) and said that they had found a hard rock which they were unable to break. So the Messenger of Allah (peace and blessings be upon him) came (to break it), and we too stood up and went with him (peace and blessings be upon him). Then he (peace and blessings be upon him) took the pickaxe and struck the rock; I had never heard a louder sound from a blow struck by any man. Then he (peace and blessings be upon him) said: "Allahu Akbar (Allah is the Greatest); Persia has been conquered." Then he (peace and blessings be upon him) struck a second blow like it and said: "Allahu Akbar (Allah is the Greatest); Rome has been conquered." Then he (peace and blessings be upon him) struck another blow like it and said: "Allahu Akbar (Allah is the Greatest); Allah Almighty has brought the tribe of Himyar as helpers and supporters."
Takhrij: This narration is found in Musnad Ahmad (6490) and al-Mu'jam al-Kabir of al-Tabarani (14500). Its chain contains an unnamed (mubham) narrator; however, there are supporting reports (shawahid) of this event in other hadith.
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب السيرة والمغازي / 4276
Hadith Gradingمحدثین:إسناده حسن
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :إسناده حسن لغيره. » «أخرجه المعجم الكبير للطبراني برقم: 14638»