John 13:37

"Master," asked Peter again, "why cannot I follow you now? I will lay down my life on your behalf.

Matthew 26:31-35

Then said Jesus, "This night all of you will stumble and fail in your fidelity to me; for it is written, 'I will strike the Shepherd, and the sheep of the flock will be scattered in all directions.'

Mark 14:27-31

Then said Jesus to them, "All of you are about to stumble and fall, for it is written, 'I will strike down the Shepherd, and the sheep will be scattered in all directions.'

Luke 22:31-34

"Simon, Simon, I tell you that Satan has obtained permission to have all of you to sift as wheat is sifted.

John 21:15

When they had finished breakfast, Jesus asked Simon Peter, "Simon, son of John, do you love me more than these others do?" "Yes, Master," was his answer; "you know that you are dear to me." "Then feed my lambs," replied Jesus.

Acts 20:24

But even the sacrifice of my life I count as nothing, if only I may perfect my earthly course, and be faithful to the duty which the Lord Jesus has entrusted to me of proclaiming, as of supreme importance, the Good News of God's grace.

Acts 21:13

His reply was, "What can you mean by thus breaking my heart with your grief? Why, as for me, I am ready not only to go to Jerusalem and be put in chains, but even to die there for the sake 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 had finished breakfast, Jesus asked Simon Peter, "Simon, son of John, do you love me more than these others do?" "Yes, Master," was his answer; "you know that you are dear to me." "Then feed my lambs," replied Jesus.
Matthew 26:31
Then said Jesus, "This night all of you will stumble and fail in your fidelity to me; for it is written, 'I will strike the Shepherd, and the sheep of the flock will be scattered in all directions.'
Mark 14:27
Then said Jesus to them, "All of you are about to stumble and fall, for it is written, 'I will strike down the Shepherd, and the sheep will be scattered in all directions.'
Luke 22:31
"Simon, Simon, I tell you that Satan has obtained permission to have all of you to sift as wheat is sifted.
Acts 20:24
But even the sacrifice of my life I count as nothing, if only I may perfect my earthly course, and be faithful to the duty which the Lord Jesus has entrusted to me of proclaiming, as of supreme importance, the Good News of God's grace.
Acts 21:13
His reply was, "What can you mean by thus breaking my heart with your grief? Why, as for me, I am ready not only to go to Jerusalem and be put in chains, but even to die there for the sake of the Lord Jesus."