Because Jesus understood what was about to happen. The hour approached when he would die as a ransom sacrifice and prove the Devil a liar.
خُذْ مَثَلًا مَا حَصَلَ عِنْدَمَا أَخْبَرَ يَسُوعُ تَلَامِيذَهُ أَنَّهُ سَيُقْتَلُ .‏