Kitab Al-Kasb Series (Part 36): Types of Squandering in Food.

There are various ways of squandering food. These include eating beyond satiety, for the Prophet says, "A son of Adam does not fill a vessel eviler than his stomach. If he cannot avoid it, then (let it be filled) one third with food, one third with drink, and one third with the breath" [Narrated by al-Tirmidhi, Ibn Majah and Ahmad]. And the Prophet says, "A few small morsels are enough for the son of Adam to fortify his backbone" [Narrated by al-Tirmidhi, Ibn Majah and Ahmad]. And he says, "There is no censure on sufficiency" [Narrated by Muslim, al-Tirmidhi, and Ahmad]....

Kitab Al-Kasb Series (Part 34): Warning Against Abstaining from Eating, Drinking and Taking Shelter.

"Whoever abstains from eating and drinking and taking shelter until he dies, has made entering the fire incumbent on him, for he has killed himself on purpose, it is as if he has killed himself with a piece of iron." The prophet has said, "Whoever kills himself with a piece of iron, then it is that piece of iron in his hand with which he will stab himself in the fire of hell." [Narrated by al-Bukhari and Muslim]....

Kitab Al-Kasb Series (Part 30): Permissible Earning is in the Category of Cooperation on Devotion and Obedience

Each of the farmer and weaver, in what they render of work, is assisting the other in something of devotion and obedience, for rendering devotion is attained by this (cooperation arising out of each one's respective work), and it is included in the (meaning of the) statement of Allah, "And help each other to kindness and conscience" [Al-Quran, Surah al-Ma'idah, verse 2]. And the Prophet says, "Verily Allah is at the assistance of the servant as long as the servant is at the assistance of his Mulsim brother" [Narrated by Muslim, Abu Dawud, al-Tirmidhi and Ibn Majah].....