After Adam and Eve sinned and were ejected from their Paradise home, God “posted at the east of the garden of Eden the cherubs and the flaming blade of a sword that was turning continuously to guard the way to the tree of life. ”
فَبَعْدَمَا أَخْطَأَ آدَمُ وَحَوَّاءُ وَطُرِدَا مِنَ ٱلْفِرْدَوْسِ ،‏ « أَقَامَ [ٱللهُ] شَرْقِيَّ جَنَّةِ عَدْنٍ ٱلْكَرُوبِيمَ وَلَهِيبَ سَيْفٍ مُتَقَلِّبٍ لِحِرَاسَةِ طَرِيقِ شَجَرَةِ ٱلْحَيَاةِ » .‏