[custom], of not bending the knee upon Sunday, is a symbol of the
resurrection, through which we have been set free, by the grace of
Christ, from sins, and from death, which has been put to death under Him.
Now this custom took its rise from apostolic times, as the blessed
Irenæus, the martyr and bishop of Lyons, declares in his treatise On
Easter, in which he makes mention of Pentecost also; upon which
[feast] we do not bend the knee, because it is
significance with the Lord’s day, for the reason already alleged