This Imamzadeh is situated at the cross roads between Asrar and Beyhaq Streets of Sabzevar .

This tomb is located in a city called Kakhak, 24 km. south of Gonabad . This is the tomb of Mohammad Ben Jafar al Sadeq, the uncle of Imam Reza, which was reputedly known as "Mohammad Al Abed".

This tomb is located in Razavi Avenue in the city of Sabzevar . The structure has four tile worked porticos in the four sides.

This tomb is one of the historical sites which dates back to the 10th century AH. Amazing tile-works of the portico, the entrance to the shrine, including inscriptions which are from Shah Tahmasb I era, are apparent. A stone is installed which belongs to Shah Soltan Hossein Safavid era (1145 AH.)

In the year 203 AH, or as it is said, in the year 202 AH, after the martyrdom of His Holiness Imam Reza (AS), the sacred body was laid to rest on the tomb of Haroon-ol Rashid. It is said that Moqadasi was the first person to name the place Mashad (meaning the place of martyrdom).