Debilis cessent elementa legis. Abbe Besnault. [The Circumcision.] In the revised Paris Breviary,1736, it is the hymn for first Vespers on the Feast of the Circumcision. It is also in the Lyons and other modern French Breviaries, and Card. Newman's Hymni Ecclesiae, 1838 and 1865. Translated as:—
1. The ancient law departs. By the compilers of Hymns Ancient & Modern, first appeared in the trial copy of that collection, 1859, and again in the 1st edition, 1861. It has passed into a few hymnals in Great Britain and America, and is sometimes altered.
--Excerpts from John Julian, Dictionary of Hymnology (1907)