1 Timothy 2:5
For there is one God and one Mediator between God and men, the Man Christ Jesus,
Deuteronomy 18
10 There shall not be found among you anyone who makes his son or his daughter pass through the fire, or one who practices witchcraft, or a soothsayer, or one who interprets omens, or a sorcerer, 11 or one who conjures spells, or a medium, or a spiritist, or one who calls up the dead. 12 For all who do these things are an abomination to the LORD, and because of these abominations the LORD your God drives them out from before you.
Hebrews 7:25
"Wherefore he (Jesus) is able also to save them to the uttermost that come unto God by him, seeing he ever liveth to make intercession for them."
Deuteronomy 26:14
I have not eaten any of the sacred portion while I was in mourning, nor have I removed any of it while I was unclean, nor have I offered any of it to the dead. I have obeyed the LORD my God; I have done everything you commanded me.
Isaiah 8:19
And when they say to you, “Seek those who are mediums and wizards, who whisper and mutter,” should not a people seek their God? Should they seek the dead on behalf of the living?
Prayer to anybody but God is ABSOLUTELY sinful.
1 John 5:14
14 Now this is the confidence that we have in Him, that if we ask anything according to His will, He hears us.
John 14:13-14
13 And whatever you ask in My name, that I will do, that the Father may be glorified in the Son. 14 If you ask anything in My name, I will do it.