Judges 3:27

And it came to pass, when he was come,
That is, to Seirath, ( Judges 3:26 ) , in the tribe of Ephraim:

that be blew a trumpet in the mountain of Ephraim;
which being an high mountain, the sound of the trumpet was heard afar off; and if Ehud's design was known to the Israelites, what he intended to do, this might be the token agreed on, should he succeed, to call them together, see ( Jeremiah 31:6 ) ;

and the children of Israel went down with him from the mount, and he
before them;
being there assembled together, and which might be the place before appointed for their rendezvous, and where and when he took the command of them, and went before them as their general.