Suhoor is "Sunnah" and has great Fazeelat which has been narrated in various ahadith. The Prophet (SAW) said: “The difference between our fasts and those of the Jews and the Christians is suhoor”.
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دلائل:
صحیح مسلم: (350/1، ط: قدیمی)
عن عمرو بن العاص ان رسول اللہ صلی اللہ علیہ وسلم قال فصل ما بین صیامنا وصیام اھل الکتاب اکلۃ السحر۔
Allah the Almighty knows best.
Darul ifta Al-Ikhlas, Karachi.