It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both); Shu'bah (may Allah have mercy on him) said: He (Qatadah) would sometimes narrate it as marfu' and sometimes not. He said: "The time of the Zuhr prayer is as long as Asr has not come; the time of Asr is as long as Maghrib has not come; the time of Maghrib is as long as the redness has not faded; the time of Isha is as long as the night has not reached its middle; and the time of Subh is as long as the sun has not risen."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 1733