c. 1340. Hampole, Prose Treat. (1876), 10. Of new prechynge þat es vanyte and vndevocyone.
c. 1386. Chaucer, Pars. T., ¶ 649. Thanne comth vndeuocion thurgh which a man is blent.
1502. Ord. Crysten Men (W. de W. 1506), II. xv. 122. Undeuocyon and foulenes of spyryte unto us is foreboden.
1565. Jewel, Repl. Harding, 14. Priuate Masse came in afterwarde by the negligence and vndeuotion of the people.