Zaqqum
Zaqqum (Arabic: زقوم) is a tree that Muslims believe grows in Jahannam (Hell). Its dwellers are compelled to eat Adh-Dhari, bitter fruit, to intensify their torment (Qur'an 69:36-37). The Khati'un may eat only the fruit or Ghislin (foul pus from the washing of their wounds) (Qur'an 69:36). Its fruits are shaped like devils' heads (Qur'an 37:62-68). According to Shaykh Umar Sulayman Al-Ashqar, a professor at the University of Jordan, once the palate of the sinners is satiated, the fruit in their bellies churns like burning oil. Some Islamic scholars believe the fruit tears their bodies apart and releases bodily fluids. The Qur'an says:
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