Luke 11:10-13

For everyone who keeps on asking [persistently], receives; and he who keeps on seeking [persistently], finds; and to him who keeps on knocking [persistently], the door will be opened. What father among you, if his son asks for a fish, will give him a snake instead of a fish? Or if he asks for an egg, will give him a scorpion? If you, then, being evil [that is, sinful by nature], know how to give good gifts to your children, how much more will your heavenly Father give the Holy Spirit to those who ask and continue to ask Him!”