The New John Gill Exposition of the Entire BibleActs 12:2
And he killed James the brother of John with the sword.
This was James, the son of Zebedee, whom our Lord told, that he
should be baptized with the baptism he was baptized with, (Matthew 20:22)
meaning the baptism of martyrdom; and he was the first martyr among
the apostles: the death he was put to was one of the four capital
punishments among the Jews, and was reckoned by them the most
disgraceful of them all, and was inflicted upon deceivers of the
people; and such an one James was thought to be F5.
F5 Misn. Sanhedrin, c. 7. sect. 1, 3. & 11. 4.