Luke 11:9-10, 13

“So I say to you, ask and keep on asking, and it will be given to you; seek and keep on seeking, and you will find; knock and keep on knocking, and the door will be opened to you. [Matt 7:7-11] 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.

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!”