Regarding the account in question, at least one commentator believes that a flame could “scarcely have been kept going throughout the long journey ” that Abraham and Isaac made.
وَتَعْلِيقًا عَلَى هٰذِهِ ٱلرِّوَايَةِ ،‏ يَقُولُ أَحَدُ ٱلْبَاحِثِينَ إِنَّ « إِبْقَاءَ ٱلنَّارِ مُشْتَعِلَةً خِلَالَ ٱلرِّحْلَةِ ٱلطَّوِيلَةِ » شِبْهُ مُسْتَحِيلٍ .‏