Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) sent the baggage and the family with me from Muzdalifah at the time of suhur (before dawn).
I said to Ata' (may Allah have mercy on him): Has it reached you that Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said that the Messenger of Allah (peace and blessings be upon him) sent me off at night? He said: No, rather he sent (him) off at the time of suhur. I said the same, and Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: We stoned the Jamrah before Fajr. And where did he pray Fajr? He said: No, but likewise at the time of suhur. A similar narration is recorded in Muslim as well, except that in it, with "at night", there are the words "in a long night", and "He said: No, but likewise at the time of suhur."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9509