'Be on Your Guard' in the Bible

Be on your guard against your fellow men, for they will betray you to courts of law, and scourge you in their Synagogues;

Presently Jesus said to them: "Take care and be on your guard against the leaven of the Pharisees and Sadducees."

How is it that you do not see that I was not speaking about bread? Be on your guard against the leaven of the Pharisees and Sadducees."

and when He admonished them, "See to it, be on your guard against the yeast of the Pharisees and the yeast of Herod,"

Moreover in the course of His teaching He said, "Be on your guard against the Scribes who like to walk about in long robes and to be bowed to in places of public resort,

“But you, be on your guard! They will hand you over to sanhedrins, and you will be flogged in the synagogues. You will stand before governors and kings because of Me, as a witness to them.

But be on your guard; I have told you everything in advance.

“Be on guard and stay constantly alert [and pray]; for you do not know when the appointed time will come.

So be on your guard that the very source of light in you is not darkness.

In the meantime, after so many thousands of the people had gathered that they were stepping on one another, Jesus began speaking first of all to His disciples, “Be continually on your guard against the leaven of the Pharisees [that is, their pervasive, corrupting influence and teaching], which is hypocrisy [producing self-righteousness].

And to the people He said, "Take care, be on your guard against all covetousness, for no one's life consists in the superabundance of his possessions."

Pay attention and always be on guard [looking out for one another]! If your brother sins and disregards God’s precepts, solemnly warn him; and if he repents and changes, forgive him.

"Be on your guard against the Teachers of the Law, who delight to walk about in long robes, and like to be greeted in the streets with respect, and to have the best seats in the Synagogues, and places of honor at dinner.

He said, “Be careful and see to it that you are not misled; for many will come in My name [appropriating for themselves the name Messiah which belongs to Me alone], saying, ‘I am He,’ and, ‘The time is near!’ Do not follow them.

“But be on guard, so that your hearts are not weighed down and depressed with the giddiness of debauchery and the nausea of self-indulgence and the worldly worries of life, and then that day [when the Messiah returns] will not come on you suddenly like a trap;

"So be on your guard at all times, praying that you may be worthy to escape these things that shall come to pass, and to take your stand in the presence of the Son of man."

Therefore, be on your guard, remembering how for three years, night and day, I never ceased, even with tears, to warn each one of you.

I urge you, brothers and sisters, to keep your eyes on those who cause dissensions and create obstacles or introduce temptations [for others] to commit sin, [acting in ways] contrary to the doctrine which you have learned. Turn away from them.

Be on your guard as to yourself and your teaching. Persevere in these things; for by doing this you will make certain your own salvation and that of your hearers.

Do you also, be on your guard against him, for he is strongly opposed to our teaching.

Therefore, [let me warn you] beloved, knowing these things beforehand, be on your guard so that you are not carried away by the error of unprincipled men [who distort doctrine] and fall from your own steadfastness [of mind, knowledge, truth, and faith],