Al-Kāfi - Volume 6 > Excellence of Dinner and Undesirability of Ignoring it
Hadith #10

عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ بَكْرِ بْنِ صَالِحٍ عَنِ ابْنِ فَضَّالٍ عَنْ عَبْدِ اللَّهِ بْنِ إِبْرَاهِيمَ عَنْ عَلِيِّ بْنِ أَبِي عَلِيٍّ اللَّهَبِيِّ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ قَالَ مَا تَقُولُ أَطِبَّاؤُكُمْ فِي عَشَاءِ اللَّيْلِ قُلْتُ إِنَّهُمْ يَنْهَوْنَّا عَنْهُ قَالَ لَكِنِّي آمُرُكُمْ بِهِ .

10. A number of our people have narrated from Sahl ibn Ziyad from Bakr ibn Salih from ibn Faddal from ‘Abd Allah ibn Ibrahim from Ah ibn abu Ah al-Lahbiy who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, once asked me, ‘What do your physicians say about dinner?’ I replied, ‘They prohibit taking dinner.’ He (the Imam) said, ‘I however, command you to take dinner.’”