Sayyiduna Abu Hurayrah (may Allah be pleased with him) reports that the Prophet (peace and blessings be upon him) said: "The pre-dawn meal (suhur) is a blessing, tharid is a blessing, and the congregation is a blessing."
Abu Ya'la recorded it. Its chain contains Abu Yasir Ammar bin Harun, and he is da'if (weak).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأطعمة / 7878