Earth receive an honoured guest;
William Yeats is laid to rest:
Let the Irish vessel lie
Emptied of its poetry.
continuing similarly for eight more stanzas. In other words, metrical regularity is also desirable in a chant. (It's a droll peculiarity of contemporary poets that even when they deprecate meter they'll boringly chant their "plainsong" to the crack of doom!)
And now a little story illustrating the virtues of practical intelligence. Years ago I was a stage manager for a production of Yeats' "On Baile's Strand." The casting is nearly all male, warriors and chieftains like Cuchulain and Conchubar. But in the middle of the play some women are brought in to sing a rhyme that will drive out deceit and keep men's oaths. The spell is some forty lines and ends
Therefore in this ancient cup
May the sword-blades drink their fill
Of the home-brew there, until
They will have for masters none
But the threshold and hearthstone.
We were having the women read together sometimes, sometimes apart. On one run-through, one of the women read the last five lines. She … actually all of them were education majors, in English, and were quite insistent on their "knowing" that one shouldn't stop at the end of a line if the sense carried forward (what Touchstone might call the Enjambment Expeditious). I objected that this would break the spell. We were disputing over such matters when the director simply re-assigned the women's parts so that they all read the last five lines together. Voilà! Speaking together, like good horses in train, they read metrically and comfortably paused at each line's end.