Noah Webster's Dictionary (imp. & p. p.) of Slumber.

Multi-Version Concordance 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)