Musnad Ahmad 1156:117

Ya'qub narrated to us, he said: My father narrated to us, from Ibn Ishaq, he said: Abdullah ibn Rafi', the freed slave of Umm Salamah, narrated to me, from Umm Salamah, the wife of the Prophet, may Allah bless him and grant him peace, he said: I heard her saying: I heard the Messenger of Allah, may Allah bless him and grant him peace, saying: "When the prayer is present, and the evening meal is present, then begin with the evening meal."