Definition of "knelt"

Then everybody once more knelt, and soon the blessing was pronounced. The choir and the clergy trooped out slowly, […] , down the nave to the western door. […] At a seemingly immense distance the surpliced group stopped to say the last prayer.

1918, W[illiam] B[abington] Maxwell, chapter V, in The Mirror and the Lamp, Indianapolis, Ind.: The Bobbs-Merrill Company