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

This beautiful Mausoleum dates back to the 11th century AH and is octagonal shaped with tall porticos and two storeyed arches and decorated with seven colored tiles and plaster moldings.

The direction of these ranges are from the north-west to the south-east and are a continuation of the Kapeh Daq and Balkhan Mountains situated in Tukemenistan.