Matthew 21:22
and whatever ye shall ask in prayer, with faith, ye shall receive.
John 11:42
I know that thou hearest me always: but I say this, because of the people here present, that they may believe that thou hast sent me."
John 16:23
tho' then you cannot ask any thing of me in person, whatever ye shall ask the father in my name, I assure you he will grant it.
Romans 8:27-28
and he that penetrates into the heart approves what the spirit desires, because what he demands for the saints is agreeable to the divine will.
1 John 5:14-15
Besides, we have this confidence in him, that if we ask any thing according to his will, he will hear us.