John 13:37

"Why cannot I follow you now, Master?" said Peter. "I will lay down my life for you." Jesus answered him.

Matthew 26:31-35

Then Jesus said to them. "This very night even you will all stumble and fall away from me; for it is written, 'I will smite the shepherd, and the sheep of the flock will be scattered.'

Mark 14:27-31

And Jesus said to them. "All of you are about to stumble, for it is written, 'I will smite the shepherd, and the sheep shall be scattered abroad.'"

Luke 22:31-34

"Simon, Simon," said the Lord, "behold, Satan has asked to have you all that he might sift you like wheat.

John 21:15

When they were through breakfast, Jesus said to Simon Peter, "Simon, son of John, do you love me more than these others do?" "Yes, Lord, you know that you are dear to me." he answered. Jesus said to him, "Feed my lambs."

Acts 20:24

But I hold not my life of any account, as dear unto myself, if only I may run my race, and accomplish the ministry which I received from the Lord Jesus, to attest the gospel of the grace of God.

Acts 21:13

"What do you mean by thus breaking my heart with your grief?" answered Paul. "For I am ready not to be bound only, but also to die at Jerusalem, for the name of the Lord Jesus."

Treasury of Scripture Knowledge

Summary

Peter said unto him, Lord, why cannot I follow thee now? I will lay down my life for thy sake.

Bible References

Why

John 21:15
When they were through breakfast, Jesus said to Simon Peter, "Simon, son of John, do you love me more than these others do?" "Yes, Lord, you know that you are dear to me." he answered. Jesus said to him, "Feed my lambs."
Matthew 26:31
Then Jesus said to them. "This very night even you will all stumble and fall away from me; for it is written, 'I will smite the shepherd, and the sheep of the flock will be scattered.'
Mark 14:27
And Jesus said to them. "All of you are about to stumble, for it is written, 'I will smite the shepherd, and the sheep shall be scattered abroad.'"
Luke 22:31
"Simon, Simon," said the Lord, "behold, Satan has asked to have you all that he might sift you like wheat.
Acts 20:24
But I hold not my life of any account, as dear unto myself, if only I may run my race, and accomplish the ministry which I received from the Lord Jesus, to attest the gospel of the grace of God.
Acts 21:13
"What do you mean by thus breaking my heart with your grief?" answered Paul. "For I am ready not to be bound only, but also to die at Jerusalem, for the name of the Lord Jesus."