Mark 14:50 fulfills this prediction exactly — 'they all left him and fled', showing the scattering.

Zechariah 13:7 is the OT prophecy Jesus quotes directly — 'Strike the shepherd, the sheep will be scattered.'

In Matthew 26:31, Jesus quotes the same prophecy from Zechariah 13:7 about the shepherd being struck and sheep scattered, a parallel account of the prediction.

John 16:32 records Jesus saying disciples will be scattered each to his own — the exact event predicted here.

John 13:37 shows Peter boasting he will lay down his life — in direct contrast to Jesus' prediction that all will fall away.

In John 16:1, Jesus says he warns them to prevent stumbling — directly related to the predicted falling away.