Narrated Anas bin Malik: Allah's Apostle said, "If the supper is served start having it before praying the Maghrib prayer and do not be hasty in finishing it."
Hadith ReferenceSahih Bukhari / The Book of Adhan / Hadith: 672
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة