Acts 2:41-47 (ESV)
41 So those who received his word were baptized, and there were added that day about three thousand souls.
42 And they devoted themselves to the apostles’ teaching and the fellowship, to the breaking of bread and the prayers.
43 And awe came upon every soul, and many wonders and signs were being done through the apostles.
44 And all who believed were together and had all things in common.
45 And they were selling their possessions and belongings and distributing the proceeds to all, as any had need.
46 And day by day, attending the temple together and breaking bread in their homes, they received their food with glad and generous hearts,
47 praising God and having favor with all the people. And the Lord added to their number day by day those who were being saved.

“Healthy churches take church membership seriously and they have certain expectations for one another”.

Ephesians 2:19 (ESV)
19 So then you are no longer strangers and aliens, but you are fellow citizens with the saints and members of the household of God,

Ephesians 2:19 (TLB)
19 Now you are no longer strangers to God and foreigners to heaven, but you are members of God’s very own family, citizens of God’s country, and you belong in God’s household with every other Christian.