Praise be to Allah, and may peace and blessings be upon the Messenger of Allah.
The Day of Judgment is the Day of Gathering. Allah will gather the first and the last of humanity, leaving none of them behind. Allah تعالى says:
“And We will gather them all together and leave none of them behind.” [Al-Kahf: 47]
Animals and creatures will also be gathered on the Day of Judgment. Allah تعالى says:
“There is no creature on earth nor a bird that flies with its wings except that they are communities like you... Then to their Lord they will be gathered.” [Al-An'am: 38]
And He سبحانه says:
“And when the wild beasts are gathered.” [Al-Takwir: 5]
It is authentically reported in Sahih Muslim that rights will be restored on the Day of Judgment, to the extent that retaliation will be carried out for a hornless sheep against a horned sheep. Then, after justice has been fulfilled, the animals will become dust, and at that point the disbeliever will wish that he were dust.
People will be gathered on the Day of Judgment barefoot, naked, and uncircumcised, as the Prophet ﷺ said:
“You will be gathered barefoot, naked, and uncircumcised.” Narrated by al-Bukhari.
When Aisha رضي الله عنها asked about men and women looking at one another, the Prophet ﷺ said:
“The matter will be too serious for them to be concerned about that.” Narrated by al-Bukhari.
That is, the severity of the horrors of the Day of Judgment will occupy people so completely that they will not pay attention to such matters.
The first person to be clothed on the Day of Judgment will be Ibrahim (Abraham), peace be upon him, as established in the hadith.
There is a hadith stating that the deceased “will be resurrected in the clothes in which he dies,” alongside the hadiths establishing that people will be gathered naked. Scholars have mentioned several ways of reconciling these texts, including:
People may initially be resurrected in their clothes, which will then wear away, leaving them naked when they reach the place of gathering.
Or it may mean that some people will be clothed in garments similar to the type of clothing they wore.
It has also been said that this applies specifically to martyrs.
Another interpretation is that “clothes” refers to a person's deeds, meaning that he will be resurrected upon the deeds with which he died.
The closest general meaning is that a person will be resurrected upon the condition in which he died, in terms of faith and deeds, as the Prophet ﷺ said:
“Every servant will be resurrected upon that which he died.” Narrated by Muslim.
People will be gathered on a land different from the land of this world. The Prophet ﷺ described it as:
“A white, reddish-white land, like a pure loaf of bread, with no landmark belonging to anyone.” Narrated by al-Bukhari.
These are among the horrors and scenes of the Day of Judgment that we must believe in as they have been described in the Qur'an and Sunnah, without trying to speculate about the exact details of how they will occur.
We ask Allah to resurrect us upon faith, Tawhid, and righteous deeds, and to make our gathering safe and peaceful.
And Allah knows best.