Majma al-Zawaid — Hadith 1714

Abu Ayyub narrated this report on the authority of Abdullah, whom the narrator thought to be Sayyiduna Abdullah bin Amr (may Allah be pleased with him). The narrator Shu'bah says: Sometimes he narrated it as a marfu' report (attributed to the Prophet), and sometimes he did not narrate it as marfu'. He says: "The time of the Asr prayer lasts as long as the time of Maghrib has not begun." After this the narrator mentioned the whole hadith.
Al-Tabarani recorded it in al-Mu'jam al-Kabir, and its narrators are the narrators of the Sahih.