That was my post, and I trust that everyone here has access to a Bible. Free
It was but it wasn't. Here is the issue. The context of Deut. 13 begins in 12:29, and from there to the end of chapter 13, it is all warnings against idolatry.
Deu 12:29 “When the LORD your God cuts off before you the nations whom you go in to dispossess, and you dispossess them and dwell in their land,
Deu 12:30 take care that you be not ensnared to follow them, after they have been destroyed before you, and that you do not inquire about their gods, saying, ‘How did these nations serve their gods?—that I also may do the same.’
Deu 12:31 You shall not worship the LORD your God in that way, for every abominable thing that the LORD hates they have done for their gods, for they even burn their sons and their daughters in the fire to their gods.
Deu 12:32 “Everything that I command you, you shall be careful to do. You shall not add to it or take from it.
Deu 13:1 “If a prophet or a dreamer of dreams arises among you and gives you a sign or a wonder,
Deu 13:2 and the sign or wonder that he tells you comes to pass, and if he says, ‘Let us go after other gods,’ which you have not known, ‘and let us serve them,’
Deu 13:3 you shall not listen to the words of that prophet or that dreamer of dreams. For the LORD your God is testing you, to know whether you love the LORD your God with all your heart and with all your soul.
Deu 13:4 You shall walk after the LORD your God and fear him and keep his commandments and obey his voice, and you shall serve him and hold fast to him.
Deu 13:5 But that prophet or that dreamer of dreams shall be put to death, because he has taught rebellion against the LORD your God, who brought you out of the land of Egypt and redeemed you out of the house of slavery, to make you leave the way in which the LORD your God commanded you to walk. So you shall purge the evil from your midst.
Deu 13:6 “If your brother, the son of your mother, or your son or your daughter or the wife you embrace or your friend who is as your own soul entices you secretly, saying, ‘Let us go and serve other gods,’ which neither you nor your fathers have known,
Deu 13:7 some of the gods of the peoples who are around you, whether near you or far off from you, from the one end of the earth to the other,
Deu 13:8 you shall not yield to him or listen to him, nor shall your eye pity him, nor shall you spare him, nor shall you conceal him.
Deu 13:9 But you shall kill him. Your hand shall be first against him to put him to death, and afterward the hand of all the people.
Deu 13:10 You shall stone him to death with stones, because he sought to draw you away from the LORD your God, who brought you out of the land of Egypt, out of the house of slavery.
Deu 13:11 And all Israel shall hear and fear and never again do any such wickedness as this among you.
etc.
(ESV)
What you stated was:
Deuteronomy 13:1–3
"If a prophet or a dreamer of dreams arises among you and gives you a sign or a wonder, and the sign or the wonder comes true... you shall not listen to the words of that prophet... for the LORD your God is testing you to find out if you love the LORD your God with all your heart and with all your soul."
However, that makes it look as though God's test is based on "a prophet or a dreamer of dreams" giving "a sign or a wonder, and the sign or wonder comes true." But, you completely left out the most important bit, the bit that is what the context of the entire chapter is about, namely, "and if he says, ‘Let us go after other gods,’ which you have not known, ‘and let us serve them'."
You left out the bit about idolatry to make it
appear that the injunction was merely about prophecy or dreams. But the entire point is to not be led astray after other gods by a false prophet or dreamer, who "has taught rebellion against the LORD your God." And, how did he teach rebellion? By actually saying "Let us go after other gods . . . and let us serve them."
All that to say, you left out context to make the passage say something it doesn't say.