Explanation of the author's statement: The third point: The lesson lies in his (peace and blessings be upon him) emphasis on this matter.

The Shaykh :"The third point: The lesson lies in his (peace and blessings be upon him) emphasis on this matter". How did he clarify this to them—yes, first, how did he clarify this to them—first, then five days before his death he said what he said, and then when he was in his final moments, he did not suffice with what had come before. May Allah send prayers and peace upon him. This indicates the Prophet's (may the prayers and peace of Allah be upon him) eagerness to protect the aspect of tawhid (the oneness of Allah), because tawhid is among the greatest matters. That is, sins, even if they are great, are lighter than shirk (associating partners with Allah). So much so that Ibn Mas'ud (may Allah be pleased with him) said: Why? Because swearing by other than Allah is a type of shirk, and swearing by Allah falsely is a sin, either a major or a minor one. The important thing is that it is lighter than shirk. Shirk is a very serious matter. In reality, we warn our Muslim brothers of what they are currently doing, which is their great preoccupation with this world, to the extent that they have become heedless of what they were created for and occupied with what they were created to use, rather than what they were created for. Now, most people, what do you find them occupied with? This world. What is in their minds? This world. Whether standing, sitting, sleeping, or awake. This is, in reality, a type of shirk because it necessitates great heedlessness from Allah (Mighty and Majestic). For this reason, the Prophet (peace and blessings be upon him) named these people slaves to what they worshipped, saying: etc. If a person, and I say this to myself first and to you and others second, if a person truly turns to Allah, he will attain what was decreed for him in this world. He will not miss what he is supposed to miss, never. The important thing is that a person turns to Allah with his heart and his limbs, so that his greatest concern is reaching Allah (Glorified and Exalted is He), His pleasure, and His Paradise, because that has been decreed for him. As for this world, this world is a means, not an end. Woe to the one who makes it an end. In reality, how can you make it an end when you do not know your status in it? And how can you make it an end when its joy is accompanied by sorrows? As the poet said:
"A day is upon us and a day is for us *** A day we are sad and a day we are happy". If you reflect on your state in this world, you will find that this is the reality, except for the one whose heart is dead. Perhaps, perhaps they have no concern other than eating, drinking, desire, and other things... something. So, the result is that we say: The Messenger (may the prayers and peace of Allah be upon him) was sent to realize the worship of Allah. For this reason, he was eager to block all the doors that lead to shirk, and he did not compromise in that. Do not say we are on... rather, be careful of it. Then... or in the house... or in his house.
The student :

The Shaykh : Ha. ... .
I say: It is obligatory for a person to pay attention to this matter. The issue of shirk is important, delicate, and dangerous. The Messenger (peace and blessings be upon him) mentioned this three times:
First: Throughout his life.
Second: Five days before he died.
Third: While he was in his final moments (peace and blessings be upon him).
"The fourth point: His prohibition of doing it at his grave before the grave was established". From where is this taken? So his grave is included in that without a doubt, yes. And it is a prohibition against taking graves as mosques, and the first to be included in that is the grave of the Prophet (peace and blessings be upon him).