'Loaf' in the Bible

Or what man is of you, of whom, if his son may ask a loaf -- a stone will he present to him?

and they forgot to take loaves, and except one loaf they had nothing with them in the boat,

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?