Gregorian chant, Germany. By Hildegard von Bingen (1098-1179).

O aeterne Deus,
Nunc tibi placeat ut in amore illo ardeas,
Ut membra illa simus, que fecisti in eodem amore,
Cum Filium tuum
Genuisti in prima aurora
Ante omnem creaturam,
Et inspice necessitatem hanc 
Que super nos cadit,
Et abstrahe eam a nobis 
Propter Filium tuum,
Et perduc nos 
In leticiam salutis.

(English translation.)
O eternal God, may you be pleased to blaze once more in love and to reforge us as the limbs you fashioned in that love, when first you bore your Son upon the primal dawn before all things created. Look upon this need that over us has fallen, draw it off from us according to your Son, and lead us back into salvation’s wholesome happiness.

Source: https://www.hildegard-society.org/2014/07/o-eterne-deus-antiphon.html