Majma al-Zawaid 1689 — Explanation of the prayer times

Alqamah narrates: A man asked Sayyiduna Abdullah (may Allah be pleased with him) about the time of the Zuhr prayer. He said: From when a man's shadow is at his feet until the shadow of everything becomes equal to its length, (the time is) between these. The man asked him about the time of Asr, and he said: Offer this prayer while the sun is bright and shining. The man asked him about the time of Maghrib, and he said: When the sun has set.
Al-Tabarani recorded it in al-Mu'jam al-Kabir. Its chain contains a narrator, Abu Nu'aym Dirar bin Surad, who is da'if (weak).