It was
narrated from ‘Abdullah bin Mas’ud that the Messenger of Allah
(ﷺ) said:
“The Adhan of Bilal should not prevent anyone of you
from
eating Suhur, for he gives the Adhan to alert those among you
who are
asleep, and so that anyone who is praying can prepare himself
for
fasting. The Fajr does not come in this manner, rather it comes
in
this manner, and it appears along the horizon.”