'Sister' in the Bible
To obey my Father who is in Heaven--that is to be my brother and my sister and my mother."
"Here are my mother and my brothers. For wherever there is one who has been obedient to God, there is my brother--my sister--and my mother."
She had a sister called Mary, who seated herself at the Lord's feet and listened to His teaching.
Martha meanwhile was busy and distracted in waiting at table, and she came and said, "Master, do you not care that my sister is leaving me to do all the waiting? Tell her to assist me."
Now a certain man, named Lazarus, of Bethany, was lying ill-- Bethany being the village of Mary and her sister Martha.
After saying this, she went and called her sister Mary privately, telling her, "The Rabbi is here and is asking for you."
"Take away the stone," said Jesus. Martha, the sister of the dead man, exclaimed, "Master, by this time there is a foul smell; for it is three days since he died."
Now standing close to the cross of Jesus were His mother and His mother's sister, Mary the wife of Clopas, and Mary of Magdala.
Herewith I introduce our sister Phoebe to you, who is a servant of the Church at Cenchreae,
to Philologus and Julia, Nereus and his sister and Olympas, and to all God's people associated with them.
Have we not a right to take with us on our journeys a Christian sister as our wife, as the rest of the Apostles do--and the Lord's brothers and Peter?
and to our sister Apphia and our comrade Archippus--as well as to the Church in your house.
Suppose a Christian brother or sister is poorly clad or lacks daily food,
The children of your elect sister send greetings to you.