Jesus taught about how to recognize false prophets.

Matthew 7:15-20

15 “Beware of people who come to you and say falsely that they are telling you what God has said. They seem to be harmless, but they are extremely harmful. They are like wolves that have covered themselves with sheepskins to make people believe that they are sheep [MET], but they actually are wolves that attack people [MET]. 16 So how will you know that they are false? Well, by seeing what plants produce, you know what kind of plants they are [MET]. For example, thornbushes cannot produce grapes, so ◄no one can pick grapes from thornbushes./can anyone pick grapes from thornbushes?► [RHQ] And thistles cannot produce figs, so ◄no one can pick figs from thistles./can anyone pick figs from thistles?► [RHQ] 17 Here is another example: All good fruit trees produce good fruit, but all unhealthy trees produce worthless fruit. 18 No good fruit tree is able to produce worthless fruit, and no unhealthy tree is able to produce good fruit. 19 And all the trees that do not produce good fruit are chopped down and burned in a fire {people chop them down and burn them in a fire} to get rid of them. Similarly, those who falsely claim to be prophets will be thrown {God will throw false prophets} into the fires of hell. 20 By seeing what plants produce, you know what kind of plants they are. Similarly, when you see what the people who come to you do, you will know if they are false prophets.”