This enmity quickly became evident when Abel, a righteous man, was killed by his brother.
وَلَاحِقًا أَظْهَرَ ٱلنَّاسُ ٱلْأَشْرَارُ ٱلْعِدَاءَ لِرَجُلٍ أَمِينٍ آخَرَ عَاشَ قَبْلَ ٱلطُّوفَانِ ٱسْمُهُ أَخْنُوخُ .‏