It is narrated from Sayyiduna al-Sa'ib bin Yazid (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "How excellent a pre-dawn meal (suhur) dates are!"
And he said: "May Allah have mercy on those who eat the pre-dawn meal."
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6659