Luke 11:9-11

9And 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.

10For every one that asks receives; and he that seeks finds; and to him that knocks it will be opened.

11But of whom of you that is a father shall a son ask bread, and [the father] shall give him a stone? or also a fish, and instead of a fish shall give him a serpent?