'Beware' in the Bible

“Let everyone beware of his neighborAnd do not trust any brother.For every brother is a supplanter [like Jacob, a deceiver, ready to grab his brother’s heel],And every neighbor goes around as a slanderer.

“Now beware so that you do not lose heart,And so that you are not afraid at the rumor that will be heard in the land—For the rumor shall come one year,And after that another rumor in another year,And violence shall be in the land,Ruler against ruler—