What are the best worldly fields of work in professions and trades?

The most rewarding gains are reliance on God, trust in Him, and having a good opinion of Him. Whoever is concerned with provision should turn to God and supplicate Him, as Almighty God says: (And ask God of His bounty), and: (And when the prayer has been concluded, disperse within the land and seek from the bounty of God). And according to the words of the Khalil (intimate friend of God), peace be upon him: (So seek provision from God, and worship Him and be grateful to Him). One must also take wealth with generosity of spirit for it to be blessed, and not let worldly life be their sole concern, but rather make the Hereafter their greatest concern, as the Prophet, peace and blessings be upon him, said: "Whoever wakes up with the worldly life as his main concern, God will scatter his affairs, and make his poverty apparent to him, and he will not receive from the worldly life except what has been decreed for him. And whoever wakes up with the Hereafter as his greatest concern, God will gather his affairs for him, and place richness in his heart, and the worldly life will come to him submissively." As for specifying a particular type of gain, it varies from person to person, and there is no general rule for it. If a specific direction occurs to a person, let him seek God's guidance concerning it.