I John 5:14.
You must be GUIDED BY HIS WORD.
IF ye abide in me, and my words abide in you, ye shall ask what ye will, and it shall be done unto you.
John 15:7.
You must ASK IN HIS NAME.
VERILY, verily, I say unto you, Whatsoever ye shall ask the Father in my name, he will give it you.
John 16:23.
WHATSOEVER ye shall ask of the Father in my name, he may give it you.
John 15:16.