The Messenger of Allah ﷺ said, "O Allah, bless the people of Medina in their city, bless them in their saa, and bless them in their mudd. O Allah, Ibrahim is Your servant and Your friend, and I am Your servant and Your messenger. Ibrahim asked You on behalf of the people of Mecca, and I ask You on behalf of the people of Medina the same as Ibrahim asked You for the people of Mecca, and the like of it along with it. Medina is encircled by angels. At every mountain pass there are two angels guarding it. Neither plague nor Dajjal shall enter it. Whoever intends harm against it, Allah will dissolve him as salt dissolves in water."
قال رسول الله ﷺ: اللهم بارك لأهل المدينة في مدينتهم، وبارك لهم في صاعهم، وبارك لهم في مدهم، اللهم إن إبراهيم عبدك وخليلك، وإني عبدك ورسولك، وإن إبراهيم سألك لأهل مكة، وإني أسألك لأهل المدينة، كما سألك إبراهيم لأهل مكة، ومثله معه، إن المدينة مشبكة بالملائكة، على كل نقب منها ملكان يحرسانها، لا يدخلها الطاعون، ولا الدجال، من أرادها بسوء، أذابه الله كما يذوب الملح في الماء.
Ahmad (1593) narrated it from Uthman bin Umar, who said, Usama (meaning Ibn Zayd) narrated to us, Abu Abdullah Qarrath narrated to us, that he heard Saad bin Malik (meaning Ibn Abu Waqqas) and Abu Hurairah relate the hadith.Its chain of transmission is hasan because of Usama bin Zayd Laythi, for his hadith is hasan.