The womb of Mary encloses

Whom [dry] land, [deep] sea, [and bright] sky | cherish, adore, [and] proclaim, | he [all the while] governing th[at] tripartite machina [of the world], | the [virginal] close of Mary bears.

Quem terra, pontus, aethera
colunt, adorant, praedicant
trinam regentem machinam,
claustrum Mariae baiulat.

     Pseudo-Venantius Fortunatus, "Quem terra."  See "Carminvm spvriorvm Appendix" viii, MGH Auct. ant. 4.1 (1881), p. 385.  I have not found it in the three-volume edition of the Poèmes ed. Reydellet, Collection des Universités de France (Paris:  Les Belles Lettres, 1994-2004).