I had to attend a meeting at the library tonight, so I missed the Maundy Thursday service (Maundy Thursday was the night of the Last Supper).
Here's a chant often meant for Holy Thursday:
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Latin Text
Ubi caritas et amor, Deus ibi est.
Congregavit nos in unum Christi amor.
Exsultemus, et in ipso jucundemur.
Timeamus, et amemus Deum vivum.
Et ex corde diligamus nos sincero.
Ubi caritas et amor, Deus ibi est.
Simul ergo cum in unum congregamur:
Ne nos mente dividamur, caveamus.
Cessent iurgia maligna, cessent lites.
Et in medio nostri sit Christus Deus.
Ubi caritas et amor, Deus ibi est.
Simul quoque cum beatis videamus,
Glorianter vultum tuum, Christe Deus:
Gaudium quod est immensum, atque probum,
Saecula per infinita saeculorum. Amen.
English Translation
Where charity and love are, God is there.
Love of Christ has gathered us into one.
Let us rejoice in Him and be glad.
Let us fear, and let us love the living God.
And from a sincere heart let us love one.
Where charity and love are, God is there.
At the same time, therefore, are gathered into one:
Lest we be divided in mind, let us beware.
Let evil impulses stop, let controversy cease.
And in the midst of us be Christ our God.
Where charity and love are, God is there.
At the same time we see that with the saints also,
Thy face in glory, O Christ our God:
The joy that is immense and good, Unto the
World without end. Amen.
(From ThoughtCo.)