Cross reference
Matthew 7:9
9 `Or what man is of you, of whom, if his son may ask a loaf -- a stone will he present to him?
Luke 11:11-13
11 `And of which of you -- the father -- if the son shall ask a loaf, a stone will he present to him? and if a fish, will he instead of a fish, a serpent present to him?
12 and if he may ask an egg, will he present to him a scorpion?
13 If, then, ye, being evil, have known good gifts to be giving to your children, how much more shall the Father who is from heaven give the Holy Spirit to those asking Him!'