Musannaf Ibn Abi Shayba 3:5537

Abu Usama narrated to us, he said: Ubayd Allah ibn Umar narrated to us, from Nafi’, from Ibn Umar, who said: The Messenger of Allah (peace be upon him) said: "When the dinner of one of you is placed and the prayer is established, then begin with the dinner, and let him not hasten until he finishes it." Nafi’ said: And food would be placed for Ibn Umar, and the prayer would be established, so he would not come to it until he finished, and he would be hearing the recitation of the Imam.