"Have faith in God. Truly I tell you, if you say to this mountain, 'be taken up and thrown into the sea,' and if you do not doubt in your heart, but believe that what you say will come to pass, it will be done for you. So I tell you, whatever you ask for in prayer, believe that you have received it, and it will be yours." ( Mark 11:22-24)

"If you abide in me, and my words abide in you, ask for whatever you wish, and it will be done for you." ( Matthew 17:20)

"Is there anyone among you who, if your child asks for bread, will give a stone? Or if the child asks for a fish, will give a snake? If you then, who are evil, know how to give good gifts to your children, how much more will your Father in heaven given good things to those who ask him." ( John 15:7)

"Or who is there among you, who, if his son asks him for bread, will give him a stone? Or if he asks for a fish, who will give him a serpent? If you then, being evil, know how to give good gifts to your children, how much more will your Father who is in heaven give good things to those who ask him!" ( Matthew 7:9-11)

Helpful links to related questions/topics

Have Faith (Trust) in God - Jesus The Faith of the Centurion The Faith of the Canaanite Woman Jesus with the Military Leader - Roman centurion The Parable of the Persistent Widow Jesus Heals a Paralytic Jesus Heals the Blind and Mute The Faith of a Syrophoenician Woman Blind Bartimaeus Receives His Sight Jesus Prays for All Believers Power for the Weak