(And We did not create the heavens and the earth and all that is between them except with the truth, and the Hour is surely coming), i.e., with justice to -
لِيَجْزِىَ الَّذِينَ أَسَاءُواْ بِمَا عَمِلُواْ
(requite those who do evil with that which they have done) 53:31 Allah says,
(And We did not create the heaven and the earth, and all that is between them without purpose! That is what those who disbelieve think! Then let those who disbelieve be warned of the Fire!)(38:27)
Aikah means a dense forest. There are other views too. Some commentators say that there was a dense forest near Madyan, therefore, Aikah is actually the title of the people of Madyan. Others have said that the people of Aikah and the people of Madyan were two different people. It was after the destruction of one of them that Sayyidna Shu'ayb (علیہ السلام) was sent to the other.
In Tafsir Ruh al-Ma’ ani, the following marfu` hadith appears with reference to Ibn ` Asakir:
The study of heaven and earth reveals that the entire system is marked throughout by wisdom. Here everything is as it should be. In this entire system, only human beings set themselves up against reality. This contradiction between human beings and the universe implies that it must come to an end. From this point of view, belief in the Day of Judgement is absolutely rational and logical, because nothing other than the Day of Judgement can eliminate this contradiction. Graciously overlooking or turning away from others’ improper behaviour is an essential part of the preacher’s task in spreading the word of God. That is, when the addressee of his call starts some irrelevant discussion or picks a quarrel, politely ignoring him instead of answering him is the best policy. Without adopting this principle, the propagation of the word of God cannot be effectively performed.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.