Look what happened to Hananiah after giving a false prophecy in the Name of the Lord:
“Thus
speaks the Lord of hosts, the God of Israel, saying: ‘I have broken
the yoke of the king of Babylon. Within two full years I will bring
back to this place all the vessels of the Lord’s house, that
Nebuchadnezzar king of Babylon took away from this place and carried to
Babylon. And I will bring back to this place Jeconiah the son of
Jehoiakim, king of Judah, with all the captives of Judah who went to
Babylon,’ says the Lord, ‘for I will break the yoke of the king of
Babylon.’”
Then Hananiah the prophet took
the yoke off the prophet Jeremiah’s neck and broke it. And Hananiah
spoke in the presence of all the people, saying, “Thus says the
Lord: ‘Even so I will break the yoke of Nebuchadnezzar king of Babylon
from the neck of all nations within the space of two full years.’” And the prophet Jeremiah went his way.
Now the word of the Lord came to Jeremiah, after Hananiah the prophet had broken the yoke from the neck of the prophet Jeremiah, saying, “Go
and tell Hananiah, saying, ‘Thus says the Lord: “You have broken the
yokes of wood, but you have made in their place yokes of iron.” For
thus says the Lord of hosts, the God of Israel: “I have put a yoke of
iron on the neck of all these nations, that they may serve
Nebuchadnezzar king of Babylon; and they shall serve him. I have given
him the beasts of the field also.”’”
Then the prophet Jeremiah said to Hananiah the prophet, “Hear now, Hananiah, the Lord has not sent you, but you make this people trust in a lie. Therefore thus says the Lord: ‘Behold,
I will cast you from the face of the earth. This year you shall die,
because you have taught rebellion against the Lord.’”
So Hananiah the prophet died the same year in the seventh month."
~•Jeremiah 28:2-4,10-17
Just sayin'. Be careful to speak a word in the Name of the Lord when it is not from Him.