Mishkat al-Masabih 7 Fasting كتاب الصوم 26

عَنْ أَنَسٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «تَسَحَّرُوا فَإِنَّ فِي السَّحُورِ بركَة»

Anas reported God’s messenger as saying, “Take a meal a little before dawn, for there is a blessing in taking a meal at that time.” (Bukhari and Muslim.)