2 Samuel 15:21

And Ittai answered the king and said, As the LORD lives and as my lord the king lives, for life or for death, wherever my lord the king shall be, there also will thy slave be.

Ruth 1:16-17

And Ruth said, Do not intreat me to leave thee or to return from following after thee, for wherever thou goest, I will go; and wherever thou shalt lodge, I will lodge; thy people shall be my people and thy God my God.

Proverbs 17:17

A friend loves at all times, and a brother is born for adversity.

1 Samuel 20:3

And David swore moreover, and said, Thy father certainly knows that I have found grace in thine eyes, and he saith in himself, Let Jonathan not know this lest he be grieved; but truly as the LORD lives and as thy soul lives, there is but a step between me and death.

1 Samuel 25:26

Now, therefore, my lord, as the LORD lives and as thy soul lives, seeing the LORD has withheld thee from coming to shed blood and from avenging thyself with thy own hand, now let thy enemies and those that seek evil to my lord be as Nabal.

2 Kings 2:2

And Elijah said unto Elisha, Tarry here, I pray thee; for the LORD has sent me to Bethel. And Elisha said unto him, As the LORD lives and as thy soul lives, I will not leave thee. So they went down to Bethel.

2 Kings 2:4

And Elijah said unto him again, Elisha, tarry here, for the LORD has sent me to Jericho. And he said, As the LORD lives and as thy soul lives, I will not leave thee. So they came to Jericho.

2 Kings 2:6

And Elijah said unto him, Tarry, I pray thee, here, for the LORD has sent me to the Jordan. And he said, As the LORD lives and as thy soul lives, I will not leave thee. And thus the two went on.

2 Kings 4:30

Then the mother of the child said, As the LORD lives and as thy soul lives, I will not leave thee. And he arose and followed her.

Proverbs 18:24

The man that has friends must show himself to be a friend, and there is a friend that sticks closer than a brother.

Matthew 8:19-20

And a certain scribe came and said unto him, Master, I will follow thee wherever thou goest.

John 6:66-69

After this, many of his disciples went back and walked no more with him.

Acts 11:23

Who, when he came and had seen the grace of God, was glad and exhorted them all to remain in their purpose of heart in the Lord.

Acts 21:13

Then Paul answered, What mean ye to weep and to break my heart? For I am ready not only to be bound, but also to die in Jerusalem for the name of the Lord Jesus.

2 Corinthians 7:3

I speak this not to condemn you, for I have said before that ye are in our hearts to die and live together with us.

Treasury of Scripture Knowledge

Summary

And Ittai answered the king, and said, As the LORD liveth, and as my lord the king liveth, surely in what place my lord the king shall be, whether in death or life, even there also will thy servant be.

Bible References

Surely

Ruth 1:16
And Ruth said, Do not intreat me to leave thee or to return from following after thee, for wherever thou goest, I will go; and wherever thou shalt lodge, I will lodge; thy people shall be my people and thy God my God.
Proverbs 17:17
A friend loves at all times, and a brother is born for adversity.
Proverbs 18:24
The man that has friends must show himself to be a friend, and there is a friend that sticks closer than a brother.
Matthew 8:19
And a certain scribe came and said unto him, Master, I will follow thee wherever thou goest.
John 6:66
After this, many of his disciples went back and walked no more with him.
Acts 11:23
Who, when he came and had seen the grace of God, was glad and exhorted them all to remain in their purpose of heart in the Lord.
Acts 21:13
Then Paul answered, What mean ye to weep and to break my heart? For I am ready not only to be bound, but also to die in Jerusalem for the name of the Lord Jesus.
2 Corinthians 7:3
I speak this not to condemn you, for I have said before that ye are in our hearts to die and live together with us.