What is the meaning of "Insha'Allah" (God willing) in the mentioned verses, and what is the virtue of saying it in worldly matters?

The meaning of "commenting on God Almighty's will" is that everything that occurs in the universe happens by His will, power, and volition. What God wills comes to be, and what He does not will does not come to be. This affirms His Lordship and Divinity. The verses indicate the virtue of saying "Insha'Allah" (God willing) and its legitimacy in every statement or action intended for the future.