One of the evidence of salvation (this is a promise) is that if we (i.e. believers) ask anything according to His will, He hears us and we will receive the requests that we asked from him.
13 These things I have written to you who believe in the name of the Son of God, in order that you may know that you have eternal life. 14 And this is the confidence that we have before him: that if we ask anything according to his will, he hears us. 15 And if we know that he hears us in whatever we ask, we know that we have the requests that we have asked from him.
1 John 5:13–15
A man after God's own heart 