Messenger of Allah, I find strength in me for fasting on a journey; is there any sin upon me (in doing it)? Thereupon the Messenger of Allah ﷺ said: It is a concession from Allah. He who took advantage of it, it is good for him, and he who preferred to observe fast, there is no sin upon him. Harun (one of the narrators) in his narration said: 'lt is a concession, and he made no mention of" from Allah".
أَنَّهُ قَالَ يَا رَسُولَ اللَّهِ أَجِدُ بِي قُوَّةً عَلَى الصِّيَامِ فِي السَّفَرِ فَهَلْ عَلَىَّ جُنَاحٌ فَقَالَ رَسُولُ اللَّهِ ﷺ هِيَ رُخْصَةٌ مِنَ اللَّهِ فَمَنْ أَخَذَ بِهَا فَحَسَنٌ وَمَنْ أَحَبَّ أَنْ يَصُومَ فَلاَ جُنَاحَ عَلَيْهِ قَالَ هَارُونُ فِي حَدِيثِهِ هِيَ رُخْصَةٌ وَلَمْ يَذْكُرْ مِنَ اللَّهِ