Explanation of the Chapter: "The Chapter on Taking Pleasure in the Misfortune of Enemies"

The Shaykh : Now, a new chapter.
He says: "The Chapter on Taking Pleasure in the Misfortune of Enemies"
Taking pleasure in the misfortune of enemies—what is the concept of this? What is taking pleasure in the misfortune of others? He said in the hadith, and I say this in the sense of killing two birds with one stone, as is said in the famous hadith, which is not authentic: This meaning may be correct sometimes, but the important point regarding the hadith is that it is not authentic. "Do not show pleasure in the misfortune of your brother, for Allah may cure him and afflict you." What does this mean? If a person is an enemy, or there is a dispute, a personal conflict, a material conflict, or whatever else, do not rejoice in the calamity that befalls him, as is said of that Muslim. Do not rejoice in the calamity that befalls your Muslim brother, because this is not permissible in the Shari'ah, because the Messenger (peace and blessings be upon him) said in the authentic, famous hadith: Do you not like to be struck by a calamity and have your enemy take pleasure in it? The answer is no. Likewise, you do not take pleasure in the calamity that befalls your Muslim brother, because this contradicts complete, correct faith.