Noah Webster's Dictionary (p. pr. & vb. n.) of Muster.

Multi-Version Concordance Mustering (1 Occurrence) Isaiah 13:4 The noise of a multitude is in the mountains, as of a great people; the noise of an uproar of the kingdoms of the nations gathered together! Yahweh of Armies is mustering the army for the battle. (WEB ASV NAS RSV NIV)