It is narrated from Sayyiduna Anas bin Malik (may Allah be pleased with him) that he (peace and blessings be upon him) said: "When the evening meal has been set out and the iqamah for prayer has been called, begin with the meal."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصلاة / 5035