Mujahid (may Allah have mercy on him) says that once people were performing Tawaf of the Ka'bah and Sayyiduna Ibn Abbas (may Allah be pleased with them both) was present in the Haram. He also had a stick with him. He said that the Messenger of Allah (peace and blessings be upon him) recited this verse «﴿يَا أَيُّهَا الَّذِينَ آمَنُوا اتَّقُوا اللّٰهَ حَقَّ تُقَاتِهِ وَلَا تَمُوتُنَّ إِلَّا وَأَنْتُمْ مُسْلِمُونَ﴾ [آل عمران: 102] » "O you who believe! Fear Allah as He should be feared, and do not die except as Muslims," and said: "If even a single drop of Zaqqum were to drip onto the earth, it would make the lives of the people of the earth bitter. Now think, what will be the state of the one whose food is Zaqqum." Benefit: "Zaqqum" is the name of a tree in Hell.