The Sunday when in the earliest centuries the newly baptised would lay aside the white garments they had been clothed with after their re-birth in the Church. It is called Quasimodo Sunday, after the first words of the Introit: Quasi modo géniti infántes, allelúja: rationabiles, sine dolo lac concupíscite, allelúja, allelúja, allelúja. Saint Peter's verses, in the 2nd chapter of his 1st Epistle:
You must put aside, then, every trace of ill-will and deceitfulness, your affectations, the grudges you bore, and all the slanderous talk; you are children new-born, and all your craving must be for the soul’s pure milk, that will nurture you into salvation, once you have tasted, as you have surely tasted, the goodness of the Lord.
Veníte, pópuli : ad sacrum et immortále mystérium et libámen agéndum : cum timóre et fide accedámus, mánibus mundis : pœniténtiæ munus communicémus : quóniam Agnus Dei propter nos Patri sacrifícium propósitus est. Ipsum solum adorémus : ipsum glorificémus cum Angelis clamántes : Alleluja.