Hadith 5:27
‘Amr b. al-‘As reported God’s messenger as saying, “The difference between our fasting and that of the People of the Book is eating shortly before dawn.” Muslim transmitted it.
وَعَنْ عَمْرِو بْنِ الْعَاصِ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «فَصْلُ مَا بَيْنَ صِيَامِنَا وَصِيَامِ أَهْلِ الْكِتَابِ أَكْلَةُ السَّحَرِ» . رَوَاهُ مُسلم
Original Reference: Mishkat al-Masabih 1983