Surah Al Hujurat Verse 12 explains the prohibition against prejudice, finding fault with others, and using it because it is tantamount to eating the flesh of a dead brother.
Surah Al Hujurat Verse 12, English, Arabic, and Transliteration
Yā ayyuhallażīna āmanujtanibụ kaṡīram minaẓ-ẓanni inna ba’ḍaẓ-ẓanni iṡmuw wa lā tajassasụ wa lā yagtab ba’ḍukum ba’ḍā, a yuḥibbu aḥadukum ay ya`kula laḥma akhīhi maitan fa karihtumụh, wattaqullāh, innallāha tawwābur raḥīm
“O people of faith! Stay away from many prejudices, indeed some prejudices are sins do not find fault with others do not let any of you use some of the others. Do any of you like to eat the flesh of his dead brother? Of course, you feel disgusted. And be devoted to Allah, verily Allah is all-beneficiary, all-merciful.” (Q.S Al Hujurat : 12)
In this verse, it is explained that their request could not have been allowed by God. They will not be returned to the world, because their hearts no longer accept the truth. In the world, they are infidels and disobedient when they are called upon to worship God alone, but when God is allied with others, they believe and justify it. Their request out of hell and return to the world for righteous charity, was answered by God with His words: He (God) said, “Abide contemptibly in it, and ye shall not speak with me.” (al-Mu’minun/23:108) If their requests were allowed and returned to the world, they would still be doing the things that God forbids as they once did.
They are liars, as God says: If they were returned to the world, they would have repeated what had been forbidden to do so. They are truly liars. (al-An’am/6: 28) This verse closes with one firmness that the verdict on the Day of Judgment is in the hands of God who will give judgment with rights and justice, God the Highest and the Greatest has nothing equal to Him. God is very resentful of those who fellowship Him and has enacted the wisdom of keeping them in hell.