Irenaeus Against Heresies V1

They further maintain that the passion which took place in the case of the twelfth AEon is pointed at by the apostasy of Judas, who was the twelfth apostle, and also by the fact that Christ suffered in the twelfth month. For their opinion is, that He continued to preach for one year only after His baptism. The same thing is also most clearly indicated by the case of the woman who suffered from an issue of blood.