When should you take your suhoor meal? Till dawn or the adhaan?
Volume 3, Book 31, Number 142:
Narrated ‘Aisha (radiallaahu `anhaa):
Bilal (radiallaahu `anhu) used to pronounce the Adhan at night, so Allah’s Apostle (sallallaahu `alayhi wasallam)? said, “Carry on taking your meals (eat and drink) till Ibn Um Maktum [Bilal] pronounces the Adhan, for he does not pronounce it till it is dawn.
Volume 3, Book 31, Number 143:
Narrated Sahl bin Sad (radiallaahu `anhu):
I used to take my Suhur meals with my family and then hurry up for presenting myself for the (Fajr) prayer with Allah’s Apostle (sallallaahu `alayhi wasallam).
Volume 3, Book 31, Number 144:
Narrated Anas (radiallaahu `anhu):
Zaid bin Thabit (radiallaahu `anhu) said, “We took the Suhur with the Prophet (sallallaahu `alayhi wasallam). Then he stood for the prayer.” I asked, “What was the interval between the Suhur and the Adhan?” He replied, “The interval was sufficient to recite fifty verses of the Quran.”
The ruling is that you “eat and drink until the white thread (light) of dawn appears to you distinct from the black thread (darkness of night).” [al-Baqarah 2:187]
Translation: eat and drink till dawn starts. Whether the adhaan starts before it or after is irrelevant; you just have to look for the dawn.
Also, it’s better to delay the suhoor meal till dawn. Imam Ahmad recorded Abu Dharr saying that Allah’s Messenger said:
«لَا تَزَالُ أُمَّتِي بِخَيْرٍ مَا عَجَّلُوا الْإِفْطَارَ وَأَخَّرُوا السُّحُور»
My Ummah will always retain goodness as long as they hasten in breaking the fast and delay the Suhur.