Sunan at-Tirmithiy كتاب الصوم باب ما جاء فى فضل السحور
The Prophet, peace and blessings of God be upon him, said, "You should have the predawn meal (1) for in eating before dawn is a blessing." Footnotes (1) (Sahūr) An optional, yet desirable meal eaten before dawn by Muslims planning to fast that day. Click on ḥadīth to read more