John 13:30

Went immediately out. Judas understood the import of Jesus’ statement (see DA 654). He knew that the Master read his purposes. His decision not to yield took him across the boundary line of his personal probation (see on v. 27). The act of betrayal resulted from his own decision (see on ch. 3:18, 19).

It was night. It was night literally (see 1 Cor. 11:23), for the Passover supper was eaten after sunset. According to the Mishnah the Passover offering must be eaten only during that night, and before midnight (Zebahim 5.8, Soncino ed. of the Talmud, p. 283). But John probably intended to express more than this. It was spiritual night for Judas, who left the presence of the “light of the world” (John 8:12), to be possessed and guided by the prince of darkness (cf. Luke 22:53; see Additional Note on Mark 1).