A popular Easter hymn, O filii et filiae is.
Originally, only nine verses, written by the Franciscan friar Jean Tisserand, made up the hymn. Discipulis adstantibus, Postquam audivit Didymus, and Beati qui non viderunt were later added. A triple Alleluia is sung as the refrain between each verse.
Scheduling what verses to sing according to the Gospel read within the days of the Easter octave would be one way of aligning our meditations with a particular moment that occurred after the Resurrection of the Lord. Below then can be our guide:
| From day onwards | Verse |
| Easter Sunday | O filii et filiae, Rex caelestis, Rex gloriae morte surrexit hodie. |
| Easter Sunday | Ex mane prima Sabbati ad ostium monumenti accesserunt discipuli. |
| Easter Sunday | Et Maria Magdalene, et Iacobi, et Salome venerunt corpus ungere. |
| Easter Sunday | In albis sedens angelus praedixit mulieribus : In Galilaea est Dominus. |
| Easter Sunday or Easter Friday |
Et Ioannes apostolus cucurrit Petro citius, monumento venit prius. |
| Easter Monday or Low Sunday |
Discipulis astantibus, in medio stetit Christus, dicens : Pax vobis omnibus. |
| Low Sunday | Ut intellexit Didymus quia surrexerat Iesus, remansit fere dubius. |
| Low Sunday | Vide, Thoma, vide latus, vide pedes, vide manus, noli esse incredulus. |
| Low Sunday | Quando Thomas vidit Christum, pedes, manus, latus suum, dixit : Tu es Deus meus. |
| Low Sunday | Beati qui non viderunt et firmiter crediderunt ; vitam aeternam habebunt. |
| Easter Sunday | In hoc festo sanctissimo sit laus et iubilatio : benedicamus Domino. |
| Easter Sunday | Ex quibus nos humillimas devotas atque debitas Deo dicamus gratias. |
Ut in omnibus laudetur Dominus.
Cappella Gregoriana Sanctæ Cæciliæ olim Xicatunensis 