Genesis 3:23]
therefore the Lord God sent him out of the garden of Eden to till the ground from which he was taken. [NKJV]

So the Lord God sent them out of the Garden of Eden and made them cultivate the soil from which they had been formed. [GNT]

Therefore the Lord God banished him from the Garden of Eden to work the ground from which he had been taken. [BSB]

DISTRACTED BY OCCUPATIONS

In this Bible verse, even though the main reason God was casting mankind out of the Garden (heaven) was to keep mankind from stretching out their hand and eating of the tree of life and thereby living forever by their own innovation or handwork, God wisely made it appear to mankind that it was for the purpose of tilling the ground or doing an earthly project (distracting them from setting their mind on spiritual, heavenly and eternal things, because they were occupied with goals, purposes and activities of earthly things - tilling the ground).

God began doing this to mankind, making them to focus and occupied on earthly or worldly things, neglecting the spiritual, heavenly and eternal things: thereby, God hides the most important purposes and secrets of eternal life from mankind, while they are busy chasing after vanities (tilling the ground they were taken from, but never able to take anything out of this world).

When God was banishing the man from the paradise of God, He made the banishment appear like He was drafting or sending the man to perform a course, a work or assignment somewhere else. Adam was the to be sent out by God from heaven (paradise/garden) to the ground to fulfill his husbandry purpose on the earth's ground. As it is written,
[Ecclesiastes 3:9-11] — "What do working people gain from their hard labor? I have seen the burden that God has laid on men to occupy them. It is beautiful how God has done everything at the right time. He has put the world in people’s minds so that mortals will not know what God is doing from the beginning to the end of time."

However, the Lord Jesus Christ sets His Disciples free from the bondage of living for earthly or worldly things, neglecting the spiritual, heavenly, needful and the eternal things. He instructed His disciples, seek first the Kingdom of God, and do not lay up treasure on earth but in heaven. Set your mind on things that are above in the heavens where Christ is sitted at God's Right Hand; not the carnality and distraction of earthly things.

Though the Book of Adam and Eve show us that Adam and Eve struggled to regain the Garden heaven instead of getting occupied with earthly things (tilling the ground), the Bible verse above painted the picture of God sending or casting them out but giving them a purpose or assignment for the ground just to occupy them.

If you are wise, you will set your mind and heart more on heavenly, needful, spiritual and eternal things, than your occupations, career, family, business, school, marriages, eating and drinking, and earthly things generally. Do not waste your lifetime, there's eternity after this life.
● ▪︎The mission for which God sent Adam out of the first heaven to do on the ground was to keep him far away from the tree of life in the heaven or garden.
● ▪︎The mission for which God sent Adam out of the first heaven to do on ground was to make him serve his sentence or penalties as suffering for his sin.
● ▪︎The mission for which God sent Adam out of the first heaven to do on ground was to occupy Adam until he dies.
● ▪︎The mission for which God sent Adam out of the first heaven to do on ground was a restitution to the ground, returning Adam back to the ground he was taken from, as God returned the woman back to the man she was taken from.
● ▪︎Basically the mission for which God sent Adam out of the first heaven to do on ground was to place Adam in position where all that God said to them would be fulfilled upon them.

Nevertheless, the banishment or mission ends when Adam is dead and then, Adam would be returning to the third heaven and to access the tree of life through the Lord and Savior Jesus Christ.