Day 39 of Be Qur'anic examines ayah 24 of Surat al-Baqarah, which warns of the inescapable consequences for those who reject the Qur'an and fail to produce a comparable surah as challenged. 

It introduces the concept of taqwa as a protective fear, urging disbelievers to fear the Fire fuelled by humans and stones (idols). 

This serves as the Qur'an's first explicit warning of Jahannam, providing a stern reminder to obey Allah out of gratitude or, alternatively, to avoid punishment. The ayah appeals to different human motivations—some adhere to rules out of a sense of right, while others do so to avoid penalties, akin to obeying traffic laws.