Where is the grave of al-Husayn? And is there any benefit in identifying its location?

Q: The questioner says: People have spoken a lot and disagreed about the grave of our master al-Husayn; where is its location? And do Muslims benefit from knowing its exact location?

A: In reality, people have differed on this. It was said that he was buried in Sham, and it was said that he was buried in Iraq, and Allah knows the reality best.
As for his head, there is disagreement about it; it was said to be in Sham, it was said to be in Iraq, and it was said to be in Egypt. The correct view is that what is in Egypt is not his grave, but rather it is a mistake, and the head of al-Husayn is not there. Some scholars have written on this matter, clarifying that there is no basis for the claim that his head is in Egypt, nor any reason for it. The most likely scenario is that it is in Sham, because it was transferred to Yazid ibn Mu'awiyah, who was in Sham. Therefore, there is no basis for the claim that it was transferred to Egypt. It was either kept in the stores of Sham, or it was returned to his body in Iraq. In any case, people have no need to know where he was buried or where he was.
What is prescribed is to supplicate for him with forgiveness and mercy. May Allah forgive him and be pleased with him. He was killed while wronged, so one should supplicate for him with forgiveness and mercy, and much good is hoped for him. He and his brother al-Hasan are the masters of the young men of Paradise, as the Prophet (peace and blessings be upon him) said. May Allah be pleased with both of them and grant them satisfaction. If one knows his grave, greets him, and supplicates for him, there is no harm, just as other graves are visited, without exaggeration or worshipping him. It is not permissible to seek intercession from him or anything else, just as with other deceased people, because nothing is sought from the dead; rather, one supplicates for them and seeks mercy for them if they are Muslim, based on the saying of the Prophet (peace and blessings be upon him): .
Whoever visits the grave of al-Husayn, al-Hasan, or any other Muslim to supplicate for them, seek mercy for them, and ask for forgiveness for them, as is done with the graves of other Muslims, this is a recommended practice (sunnah). However, visiting graves to supplicate to their occupants, seek their help, or ask them for intercession is among the abominations, indeed among major shirk (associating partners with Allah). It is not permissible to build a mosque, dome, or anything else on them, because the Messenger (peace and blessings be upon him) said: , and it is agreed upon that it is authentic. Also, Jabir ibn Abdullah (may Allah be pleased with both of them) narrated in the Sahih from the Prophet (peace and blessings be upon him) that he prohibited plastering graves, sitting on them, and building on them. Therefore, it is not permissible to plaster the grave, perfume it, place curtains on it, or build on it. All of this is prohibited and is a means to shirk.
Nor is prayer performed at the grave, based on the saying of the Prophet (peace and blessings be upon him): , which Muslim narrated in his Sahih from Jundub ibn Abdullah al-Bajali (may Allah be pleased with him) . This hadith indicates that it is not permissible to pray at graves or to make them into mosques. Also, because that is a means to shirk, where people worship other than Allah by supplicating to them, calling for their aid, making vows to them, and rubbing against their graves seeking their blessing. For this reason, the Prophet (peace and blessings be upon him) warned against it. Graves are only visited in a lawful manner, to greet them, supplicate for them, and seek mercy for them, without traveling specifically for that purpose. Allah is the One who grants success and guides to the straight path.