| Hallmarks of the Saints | 2 Zaqqum denotes the tree of disbelief. The Quran has compared true belief to a good tree which brings forth its fruit at all times (14:25–26) and disbelief to an evil tree—Zaqqum (14:27). [Publisher] |
| The Essence of Islam – Volume II | 15 Ibrahim, 14:27 [Publisher] |
| The Holy War | 2 Surah Ibrahim, 14:25–28 [Publisher] |
