William Burkitt on Matthew 26:31

Here our Saviour acquaints his disciples, that by reason of his approaching sufferings, they should all of them be so exceedingly offended, that they would certainly forsake and leave him; which accordingly came to pass.

Learn thence, That Christ's dearest friends forsook him, and left him alone in the midst of his greatest distress and danger.

Observe, 2. What was the cause of this their flight, it was the prevalency of their fear.

Thence note, How sad it is for the holiest and best of men to be left under the power of their own fears in a day of temptation.