According to the Mosaic Law, a person was to help an enemy to free his animal that had fallen under its load.
وَهٰذِهِ ٱلْكِتَابَاتُ تُظْهِرُ أَنَّ ٱللهَ يُبَارِكُ ٱلَّذِينَ يُكِنُّونَ مَحَبَّةً لِلْآخَرِينَ .‏