Muhammad b. Ibrahim b. Ishaq narrated to us. He said: `Abd al-`Aziz b. Yahya narrated to us. He said: Muhammad b. Zakariyya narrated to us. He said: Muhammad b. `Ammara narrated to us from his father from al-Sadiq Ja`far b. Muhammad from his father from his forefathers . He said:

The Messenger of Allah (s) said: A part of me will be buried in Khurasan. A believer will not visit it except that Allah will make Paradise mandatory for him and forbid his body from the Fire.