After God created man in his own image, the first thing that God does is, he blesses them and after God blessed them, the first command God gave them was to be fruitful and multiply (Genesis 1:28).

Points to ponder:
How are you and I doing in the first command of God? Are we fruitful?  If we are, what kind of fruit are we bearing – good or evil fruit? Jesus said, “A tree that does not bear good fruit is fit only to be cut and burned.” (Matthew 7:19-20). The (good) fruit of the Spirit is love, joy, peace, longsuffering, gentleness, goodness, faith, meekness and temperance and against such there is no law (Galatians 5:22). Is this fruit evident in our lives? With the blessings of God comes his command to be fruitful. How are we faring in this command?

Genesis 1:28 (KJV)
28 And God blessed them, and God said unto them, Be fruitful, and multiply, and replenish the earth, and subdue it: and have dominion over the fish of the sea, and over the fowl of the air, and over every living thing that moveth upon the earth.