The sword is the word it is represented many times in the Bible as the word.
Either the word of God or our words of our mouths.
Rev 19:21 And the remnant were slain with the sword of him that sat upon the horse, which sword proceeded out of his mouth: and all the fowls were filled with their flesh.
Many do not make to the promise land because of negative words or words of death.
In end times there are safe places to be but you must watch your tongue or you wont get there.