'Be on Your Guard' in the Bible

In these circumstances, a crowd of many thousands came together, so that they were trampling on one another. He began to say to His disciples first: “Be on your guard against the yeast of the Pharisees, which is hypocrisy.

Be on your guard. If your brother sins, rebuke him, and if he repents, forgive him.

“Be on your guard, so that your minds are not dulled from carousing, drunkenness, and worries of life, or that day will come on you unexpectedly