And it came to pass in those days, that he went out into a mountain to pray, and continued all night in prayer to God.
All Commentaries on Luke 6:12 Go To Luke 6
Glossa Ordinaria
AD 1480
Because in truth he was of Canain Galilee, which is interpreted zeal; and this is added to distinguish him from Simon Peter. It follows, Judas the brother of James, and Judas Iscariot, who also betrayed him.