Deuteronomy 18:21

A New Prophet Like Moses

²⁰ But the prophet who presumes to speak a word in My name which I have not commanded him to speak, or which he speaks in the name of other gods—that prophet shall die.’ ²¹ If you say in your heart, ‘How will we know and recognize the word which the Lord has not spoken?’ ²² When a prophet speaks in the name of the Lord and the thing does not happen or come true, that is the thing which the Lord has not spoken. The prophet has spoken it presumptuously; you shall not be afraid of him.

From the Lord

Jehovah

1 Thessalonians 5:24

Faithful and absolutely trustworthy is He who is calling you [to Himself for your salvation], and He will do it [He will fulfill His call by making you holy, guarding you, watching over you, and protecting you as His own].

1 John 4:1-3

Beloved, do not believe every spirit [speaking through a self-proclaimed prophet]; instead test the spirits to see whether they are from God, because many false prophets and teachers have gone out into the world.

Revelation 2:2

‘I know your deeds and your toil, and your patient endurance, and that you cannot tolerate those who are evil, and have tested and critically appraised those who call themselves apostles (special messengers, personally chosen representatives, of Christ), and [in fact] are not, and have found them to be liars and impostors;