1 Corinthians 1:9

9 aGod is faithful, by whom you were called into the bfellowship of his Son, Jesus Christ our Lord.

Hebrews 2:11

11For che who sanctifies and dthose who are sanctified eall have one source.
Greek  all are of one
That is why he is not ashamed to call them gbrothers,
Or  brothers and sisters. The plural Greek word adelphoi (translated “brothers”) refers to siblings in a family. In New Testament usage, depending on the context, adelphoi may refer either to men or to both men and women who are siblings (brothers and sisters) in God’s family, the church; also verse 12

1 John 1:3

3 ithat which we have seen and heard we proclaim also to you, so that you too may have fellowship with us; and indeed jour fellowship is with the Father and with his Son Jesus Christ.
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