رزقِ حلال

It is narrated from Abdullah ibn Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace be upon him) said: "Seeking a lawful livelihood is an obligation after the (other) obligation."

After faith in Allah and His Messenger (peace be upon him), and the prayer, zakat, fasting and the other basic pillars and obligations of Islam, to strive and take care to earn a lawful livelihood is, at the second level, also an Islamic duty — for one who bears responsibility for the maintenance of himself and the other members of his household. If a person is negligent in this, there is the danger that he will feed himself and his family from unlawful earnings.

This hadith declares a duty not merely to earn, but to seek and be concerned for a lawful livelihood; and the special aim of this teaching is to keep away from what is unlawful.