(a) Nafi' narrates from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said: "When the meal has been set out and the iqamah for prayer has been called, do not get up until you have finished eating."
(b) Musaddad added: When food was set before Sayyiduna Abdullah bin Umar (may Allah be pleased with them both), or his food was brought, he would not get up until he had finished eating, even if he heard the iqamah or the recitation of the imam.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5039