Musnad Ahmad 2:49

'Affan narrated to us, Hammam narrated to us, Qatadah narrated to us, Abu al-'Aliyah narrated to me, from Ibn 'Abbas, who said: "Men who are pleasing to me bore witness before me, among them 'Umar—and the most pleasing of them to me is 'Umar—that the Messenger of Allah (ﷺ) said: 'There is no prayer after the morning [prayer] until the sun rises, and there is no prayer after the afternoon [prayer] until the sun sets.'"