Musnad Ishaq

Benefits:
The scholars have presented various explanations of the aforementioned hadith: Does it actually mean that the people of disbelief eat more and the believer eats less? Or does it refer to all biological matters in which, practically, there is a vast difference between a person of faith and a person of disbelief? The scholars have given several interpretations of this:

➊ First: The seven intestines of the disbeliever refer to his seven traits: (1) Greed (2) Covetousness (3) Long hopes (4) Avarice (5) Ill-mannered nature (6) Envy (7) Being heavy-bodied.

➋ Second: This ruling applies to some believers and some disbelievers; it does not refer to the entire category of believers or disbelievers.

➌ Third: In the hadith, the believer refers to the perfect believer who, in this world, turns away from following his desires and consumes food according to his need.

➍ Fourth: Some believers eat with one intestine, and most of the people of disbelief eat with seven intestines.

➎ Fifth: Mawlana Dawood Raz, while explaining this hadith with reference to Shah Waliullah, states that its meaning is that all the greed of the disbeliever is centered on his stomach, whereas the true objective of the believer is the Hereafter. Therefore, the characteristic of the believer is that eating less is among the best qualities of faith, and the greed for excessive eating is a trait of disbelief.
(Sahih Bukhari, Muhammad Dawood Raz: 7/130)

Imam Nawawi rahimahullah states: The essence of the aforementioned hadith is that one should be content with acquiring a little in this world and should incline towards asceticism (zuhd) in worldly matters.
(Sharh Muslim by Nawawi: p. 1561)