It is narrated from Sayyiduna Abu Suwayd (may Allah be pleased with him), who was one of the Companions of the Prophet (peace and blessings be upon him), that the Prophet (peace and blessings be upon him) made du'a for those who eat suhur.
Hadith Referenceالمعجم الكبير للطبراني / مسند من يعرف بالكنى / 19048