How do we know that Jesus knew Judas would betray him?

In John 13:21, Jesus clearly declares that one of the apostles will betray Him, showcasing His divine foreknowledge. This assertion serves not only as a revelation of Judas's impending treachery but also highlights the overall theme of divine sovereignty in the narrative of Christ’s suffering and passion. Jesus's troubled spirit emphasizes the personal anguish He felt regarding this betrayal. The certainty of this event is a testament to the fulfillment of prophecy and God's overarching plan of salvation, even through the actions of those who oppose Him.