Musnad Ahmad 31:584

'Abd al-Rahman narrated to us, from Za'idah, from 'Abd al-Malik, from Qaza'ah, the freed slave of Ziyad, from Abu Sa'id, who said: I heard the Prophet, peace and blessings of Allah be upon him, saying: "There is no prayer after two prayers: after the dawn (Subh) until the sun rises, and after the afternoon (Asr) until the sun sets."