Sunan an Nasai
2163
Sahih+2

It was narrated that AL-'Irbad bin Sariyah said:"I heard the Messenger of Allah inviting people to have Sahur in Ramadan. He said: 'Come to the blessed breakfast." (Hasan) Chatper 26. Calling Sahur "Ghada" (Breakfast)

SahihAbu Ghuddah
SahihAl-Albani