Quran

(Praise be to Allah, the Lord of the worlds), for He Has willed and decreed the destruction of the disbelievers, as this highlights His signs, honors His allies, humiliates His enemies and confirms the truthfulness of what the Messengers brought. Al-Saadi: 256.
Question: In this verse, the destruction of polytheists is concluded with praising Allah. Why?

Praising Allah for the destruction of the wrongdoers is the right thing to do because with their absence, the lives of people become righteous, which is a blessing that entails giving praise to Allah. Ibn Ashur: 7/232.
Question: The destruction of the wrongdoers is a blessing from Allah. Explain.

Allah praises Himself for the destruction of the wrongdoers because it is His favor upon His Messengers. So, Allah praises Himself to teach His Messengers and their followers to do the same and praise Him for ridding them of the wrongdoers' evil. Al-Baghawi: 2/22.
Question: What should we do when witnessing the demise of the wrongdoers?

Diversifying the signs means different types of them, where they become evident as proofs from observations in the heavens and earth, proofs from within the souls of people, and other proofs from the affairs of previous nations. Ibn Ashur: 7/235.
Question: How do signs that are mentioned in this verse become diversified?

This Quran is a warning to all people, but only (those who fear being gathered to their Lord) will benefit from it, for they are certain that they will move from this realm to the eternal realm of the Hereafter, and therefore they do what will benefit them and refrain from what will harm them. Al-Saadi: 257.
Question: Warning by the Quran is directed to those who fear being gathered before Allah. Why?

These time periods, morning and evening are singled out for mention because they are normally busy times for most people, and whoever is worshiping Allah during these times, is more likely to do that during idle times. Al-Qurtubi: 8/389.
Question: In this verse, morning and evening are singled out for mention. Why?

This verse refers to the poor Companions of the Prophet (ﷺ), such as Bilal, Ammar bin Yassir, Abdullah bin Masoud, Khabbab, Suhaib and others, when some polytheists said to the Prophet (ﷺ): "We cannot sit with these people because of our high standing, so if you send them away, we will follow you." And so, this verse was revealed in response to their request. Ibn Juzay: 1/271.
Question: For one who invites others to Allah, this verse sets an approach on how to deal with them. What is it?