Matthew 26:37-38

And taking Peter and the two sons of Zebedee, he began to be deeply sorrowful, and to be overwhelmed with dejection.

Luke 22:44

And being in an agony, he prayed with greater intenseness: and his sweat was as clots of blood falling on the ground.

2 Corinthians 2:4

For out of much affliction and anguish of heart I wrote unto you with many tears, not that ye should be grieved, but that ye might know the love which I have more abundantly towards you.

Treasury of Scripture Knowledge

Summary

Therefore I will not refrain my mouth; I will speak in the anguish of my spirit; I will complain in the bitterness of my soul.

Bible References

The anguish

Matthew 26:37
And taking Peter and the two sons of Zebedee, he began to be deeply sorrowful, and to be overwhelmed with dejection.
Luke 22:44
And being in an agony, he prayed with greater intenseness: and his sweat was as clots of blood falling on the ground.
2 Corinthians 2:4
For out of much affliction and anguish of heart I wrote unto you with many tears, not that ye should be grieved, but that ye might know the love which I have more abundantly towards you.