Tirmidhi

Hadith Commentary: Benefits and Issues:
(1)
In the aforementioned hadith of Abu Hurairah radi Allahu anhu, the Prophet (sallallahu alayhi wa sallam) himself had given the command to convey this glad tidings. However, when Umar radi Allahu anhu presented before him the negative aspect of this, and the Prophet considered it to be against the public interest, he accepted Umar’s opinion. From this, the principle is derived that if a senior person—even if he is Allah’s Prophet or Messenger—expresses his opinion in a matter, and a person of insight perceives a harmful aspect in it, then he should not hesitate to present his opinion and advice with respect and etiquette. And the senior should reflect upon that opinion or advice; if the other’s opinion is better and in accordance with wisdom and benefit, then he should accept it and not hesitate in the least to retract his own opinion. The Prophet (sallallahu alayhi wa sallam) changed his opinion after Umar radi Allahu anhu’s suggestion.

(2)
As long as Mu’adh radi Allahu anhu was alive, there was no likelihood of this hadith being lost. When he was about to die, he feared the concealment of knowledge (kitman al-‘ilm), which is a major sin. And the prohibition of the Prophet (sallallahu alayhi wa sallam) was for a reason of benefit and wisdom: that people might rely on it and become lax in striving and action. However, when the propagation of the religion became widespread, and by the time of his (the Prophet’s) passing, the religion and Shari’ah had been completed, and within the people, the religion had become firmly established and the zeal for action had become strong, and there was no longer any fear of negligence in action and striving, then Mu’adh radi Allahu anhu narrated this hadith at the time of his death. Because the prohibition was not for the purpose of making it unlawful (tahrim), otherwise a person of knowledge and virtue like Mu’adh would not have feared the concealment of knowledge. And the reality is that the sincere affirmation of the testimony of faith (kalimat al-shahadah) from the depths of the heart compels a person to complete adherence to the religion, as a result of which a person is saved from Hellfire.

Explanation:
1:
The meaning of the hadith is that the Day of Resurrection will be established when there will remain no one on the face of the earth who takes the name of Allah.
Only those people will remain who will be the worst among the creation,
because from the direction of Yemen a wind will blow which will seize the souls of the believers,
and only non-believers will remain.