I heard the Messenger of Allah ﷺ say, "The son of Adam fills no vessel worse than his stomach. A few morsels are enough for the son of Adam to keep his back straight. But if he must eat more, then a third for his food, a third for his drink, and a third for his breath."
سمعت رسول الله ﷺ يقول: ما ملأ ابن آدم وعاء شرا من بطن، حسب ابن آدم أكلات يقمن صلبه، فإن كان لا محالة، فثلث طعام، وثلث شراب، وثلث لنفسه.
Tirmidhi (2380), Ahmad (17186) reported it, and Ibn Hibban (5236) and Hakim (4/331) graded it sahih, all of them through chains from Yahya bin Jabir Tai, who said, I heard Miqdam bin Maadi Kareeb Kindi, and he mentioned it. Its chain of transmission is sahih. Tirmidhi said, "This is a hasan sahih hadith." Hakim said, "This is a hadith with a sahih chain of transmission, though the two of them (Bukhari and Muslim) did not report it."As for what Abu Hatim said in Al-Marasil (911), "Yahya bin Jabir's narration from Miqdam is mursal," it turns out that Yahya bin Jabir explicitly stated that he heard directly from Miqdam in this hadith, as found in the versions of Ahmad and Hakim, so this should be understood as a connected chain. As for narrations where he did not explicitly state that he heard it, those should be understood as mursal, as Abu Hatim said. There are thirty-nine years between the death of Miqdam and that of Yahya bin Jabir, so it is possible that they met. Accordingly, he belongs to the fifth generation, meaning those who saw one or two of the companions, and not to the sixth generation, those for whom no meeting with any companion has been established, as Ibn Hajar mentioned in his biographical entry on Yahya bin Jabir Tai in Al-Taqrib.This is further supported by what Ibn Hibban (5236) reported through the route of Salih bin Yahya bin Miqdam bin Maadi Kareeb, from his father, from his grandfather Miqdam, who mentioned something similar. Salih bin Yahya bin Miqdam and his father were mentioned by Ibn Hibban in Al-Thiqat, and no one else declared them reliable, but there is no harm in citing them as corroborating narrators.