Final answer:
Genesis 6:3 states that man's days would be limited to 120 years, indicating a reduction in human lifespan as a divine decision due to the wickedness observed by God.
Step-by-step explanation:
According to Genesis 6:3, the number of days that shall be numbered for man is 120 years. This passage is often interpreted to mean that God is setting a limit on human lifespan. This verse is a part of the events leading up to the story of Noah's Ark, where God expresses His discontent with the wickedness of humanity and decides to send a great flood to cleanse the earth, sparing only Noah's family and the animals they bring into the Ark. The context of this decision includes various occurrences described in the Book of Genesis, such as the Garden of Eden narrative where Adam and Eve eat from the Tree of Knowledge and are thus subjected to mortality.