Sayyiduna Sa'd bin Abi Waqqas (may Allah be pleased with him) said: I heard the Prophet (peace and blessings be upon him) say: "There are two prayers after which no prayer is to be offered: the Fajr prayer, until the sun has risen, and the Asr prayer, until the sun has set."
Ahmad and Abu Ya'la recorded it, and its narrators are the narrators of the Sahih.