|Noah Webster's Dictionary|
(imp. & p. p.) of Slumber.
Slumbered (2 Occurrences)
Matthew 25:5 Now while the bridegroom delayed, they all slumbered and slept. (WEB KJV ASV WBS RSV)
Nahum 3:18 Slumbered have thy friends, king of Asshur, Rest do thine honourable ones, Scattered have been thy people on the mountains, And there is none gathering. (YLT)