John 13:37

Peter said to him, Lord, why can't I follow you now? I will lay down my life for your sake.

Matthew 26:31-35

then said Jesus to them, I shall be the occasion of your revolting all from me this night: for it is written, "I will smite the shepherd, and the sheep of the flock shall be scattered."

Mark 14:27-31

and Jesus said to them, this night you will all be staggered upon my account: for it is written, "I will smite the shepherd, and the sheep shall be scattered."

Luke 22:31-34

Then said Jesus, Simon, Simon, satan has demanded to shake you, and my disciples, like wheat in a sieve.

John 21:15

So when they had dined, Jesus said to Simon Peter, Simon son of Jonas, do you love me more than these do? yes, Lord, said he, you know that I love you. Jesus reply'd, feed my lambs.

Acts 20:24

things that little affect me, nor is life so much my concern, as to finish my course, and the charge I receiv'd from the Lord Jesus, to attest the declaration of the divine favour.

Acts 21:13

but Paul replied, what do you mean by afflicting me thus with your tears? I am not only ready to meet my chains, but even 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
So when they had dined, Jesus said to Simon Peter, Simon son of Jonas, do you love me more than these do? yes, Lord, said he, you know that I love you. Jesus reply'd, feed my lambs.
Matthew 26:31
then said Jesus to them, I shall be the occasion of your revolting all from me this night: for it is written, "I will smite the shepherd, and the sheep of the flock shall be scattered."
Mark 14:27
and Jesus said to them, this night you will all be staggered upon my account: for it is written, "I will smite the shepherd, and the sheep shall be scattered."
Luke 22:31
Then said Jesus, Simon, Simon, satan has demanded to shake you, and my disciples, like wheat in a sieve.
Acts 20:24
things that little affect me, nor is life so much my concern, as to finish my course, and the charge I receiv'd from the Lord Jesus, to attest the declaration of the divine favour.
Acts 21:13
but Paul replied, what do you mean by afflicting me thus with your tears? I am not only ready to meet my chains, but even to die at Jerusalem, for the name of the Lord Jesus.