Verses with the word sister in the New Testament (15 verses):

Matthew 12:50
For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother.

Mark 3:35
For whosoever shall do the will of God, the same is my brother, and my sister, and mother.

Luke 10:39
And she had a sister called Mary, which also sat at Jesus' feet, and heard his word.

Luke 10:40
But Martha was cumbered about much serving, and came to him, and said, Lord, dost thou not care that my sister hath left me to serve alone? bid her therefore that she help me.

John 11:1
Now a certain man was sick, named Lazarus, of Bethany, the town of Mary and her sister Martha.

John 11:5
Now Jesus loved Martha, and her sister, and Lazarus.

John 11:28
And when she had so said, she went her way, and called Mary her sister secretly, saying, The Master is come, and calleth for thee.

John 11:39
Jesus said, Take ye away the stone. Martha, the sister of him that was dead, saith unto him, Lord, by this time he stinketh: for he hath been dead four days.

John 19:25
Now there stood by the cross of Jesus his mother, and his mother's sister, Mary the wife of Cleophas, and Mary Magdalene.

Romans 16:1
I commend unto you Phebe our sister, which is a servant of the church which is at Cenchrea:

Romans 16:15
Salute Philologus, and Julia, Nereus, and his sister, and Olympas, and all the saints which are with them.

1 Corinthians 7:15
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.

1 Corinthians 9:5
Have we not power to lead about a sister, a wife, as well as other apostles, and as the brethren of the Lord, and Cephas?

James 2:15
If a brother or sister be naked, and destitute of daily food,

2 John 1:13
The children of thy elect sister greet thee. Amen.