Here are 3 Bible verses about outreach ministry from the Old and New Testaments of the Holy Bible (King James Version), sorted from most to least relevant.
Mark 16:15-16 KJV
And he said unto them, Go ye into all the world, and preach the gospel to every creature. He that believeth and is baptized shall be saved; but he that believeth not shall be damned.
1 Peter 4:10 KJV
As every man hath received the gift, even so minister the same one to another, as good stewards of the manifold grace of God.
1 Corinthians 7:15 KJV
But if the unbelieving depart, let him depart. A brother or a sister is not under bondage in such cases: but God hath called us to peace.