613 Mitzvot
Negative Mitzvah 28
Not to listen to the false prophet
 

Devarim (Deuteronomy) 13:4(3)
Lo tishma el-divrey hanavi hahu o el-cholem hachalom hahu ki menaseh YHVH Eloheychem etchem lada’at hayishchem ohavim et-YHVH Eloheychem bechol-levavchem uvechol-nafshechem.
you shall not listen to the words of that prophet, or to that dreamer of dreams: for YHVH your Elohim proves you, to know whether you love YHVH your Elohim with all your heart and with all your soul.

If we truly love YHVH with all our heart and soul, we will not listen to false prophets. The next pasuk (verse) says:

Deuteronomy 13:4  You shall walk after YHVH your Elohim, and fear him, and keep his mitzvot, and obey his voice, and you shall serve him, and cleave to him.

We should only listen to Him and those who teach according to His Word.

Yeshayahu (Isaiah) 8:20 
Turn to the Torah and to the testimony! If they don’t speak according to this word, surely there is no morning for them.

We should only listen to those prophets that speak according to the Torah of YHVH.

Acts 17:11  Now these were more noble than those in Thessalonica, in that they received the word with all readiness of the mind, examining the Scriptures daily to see whether these things were so.

With any teacher, even one that you trust, you should test his or her words by examining the Scriptures to see if what they say is true.

1 Yochanan (John) 4:1 Beloved, don’t believe every spirit, but test the spirits, whether they are of Elohim, because many false prophets have gone out into the world.

Yochanan (John) 10:3-5
The gatekeeper opens the gate for him, and the sheep listen to his voice. He calls his own sheep by name, and leads them out. Whenever he brings out his own sheep, he goes before them, and the sheep follow him, for they know his voice. They will by no means follow a stranger, but will flee from him; for they don’t know the voice of strangers.

When we love and follow YHVH our Shepherd, we listen to His voice, and we know the Shepherd's voice and we follow Him. But the voice of the stranger, the false prophets, we flee from them. How is the voice of the stranger different?

Yochanan (John) 10:10  The thief only comes to steal, kill, and destroy. I came that they may have life, and may have it abundantly.

I call heaven and earth to witness against you this day, that I have set before you life and death, the blessing and the curse: therefore choose life, that you may live, you and your seed; to love YHVH your Elohim, to obey his voice, and to cleave to him; for he is your life, and the length of your days; that you may dwell in the land which YHVH swore to your fathers, to Avraham, to Yitzchak, and to Ya’akov, to give them. (Devarim/Deuteronomy 30:19-20)

Yeshua offers life abundant. That abundantly blessed life comes from obeying the voice of YHVH with faith in Yeshua. We trust Him and he enables to know and walk in the truth. The Ruach HaKodesh (Holy Spirit) also helps us to recognize the truth, so that we can reject the lie.

Shalom v'brakhot
Moreh Chizkiyah Shlomo

Be libi tzavanti imratecha le ma'an lo echta lach.
(Tehillim 119:11)