For just as each of us has one body with many members, and these members do not all have the same function, so in Christ we, though many, form one body, and each member belongs to all the others.
Romans 12:4-5

How good and pleasant it is
when God’s people live together in unity!
Psalm 133:1

I appeal to you, brothers and sisters, in the name of our Lord Jesus Christ, that all of you agree with one another in what you say and that there be no divisions among you, but that you be perfectly united in mind and thought.
1 Corinthians 1:10

All the believers were one in heart and mind. No one claimed that any of their possessions was their own, but they shared everything they had.
Acts 4:32