The People of the Book did not eat suhur
MUSLIM 1096a:
from ʿAmr b. al-ʿĀṣ —
that the Messenger of Allah ﷺ said: "The difference between our ˹way of˺ fasting and that of the People of the Book is eating of the suhur.
مسلم ١٠٩٦a:
عن عمرو بن العاص —
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ فَصْلُ مَا بَيْنَ صِيَامِنَا وَصِيَامِ أَهْلِ الْكِتَابِ أَكْلَةُ السَّحَرِ