1 John 5:15

And if we know that he is listening to us in what ever we are asking, we know that we obtain the petitions which we have made to him.

Mark 11:24

That is why I am telling you that whatever you ask for in prayer, believe that you have received it, and it shall be yours.

Luke 11:9-10

"So I say to you. "Ask, and it shall be given to you; seek, and ye shall find; knock and it shall be opened to you.

1 John 5:18-20

We know that whoever is a child of God is not habitually committing sin; but he who is God's child guards himself, and the Evil One never touches him.

Treasury of Scripture Knowledge

Summary

And if we know that he hear us, whatsoever we ask, we know that we have the petitions that we desired of him.

General references

Bible References

We know

Mark 11:24
That is why I am telling you that whatever you ask for in prayer, believe that you have received it, and it shall be yours.
Luke 11:9
"So I say to you. "Ask, and it shall be given to you; seek, and ye shall find; knock and it shall be opened to you.

General references

Matthew 21:22
"and everything that you ask for in your prayers you shall have, if you believe."