woe to that man by whom the Son of man shall be betrayed: it were better for him, if that man had not been born” (Mt 26:24)

Judas went to where he belongs. The Christians in the following centuries always believed that Judas was in hell.

Leo the Great. The godless betrayer, shutting his mind to all these things [expressions of the Lord’s mercy], turned upon himself, not with a mind to repent, but in the madness of self-destruction: so that this man who had sold the Author of life to the executioners of His death, even in the act of dying sinned unto the increase of his own eternal punishment.

Augustine. For if it is not lawful to take the law into our own hands, and slay even a guilty person whose death no public sentence has warranted, then certainly he who kills himself is a homicide. … Do we justly execrate the deed of Judas, and does truth itself pronounce that by hanging himself he rather aggravated than expiated the guilt of that most iniquitous betrayal, since, by despairing of God’s mercy in his sorrow that wrought death, he left to himself no place for a healing penitence? … For Judas, when he killed himself, killed a wicked man, and passed from this life chargeable not only with the death of Christ, but also with his own: for though he killed himself on account of his crime, his killing himself was another crime. (The City of God, Bk. I, ch. 17)