Since this year Father’s Day (in the U.S.) coincides with Corpus Christi (transferred from Thursday to today, Sunday):
“And which of you, if he ask his father bread, will he give him a stone? or a fish, will he for a fish give him a serpent? Or if he shall ask an egg, will he reach him a scorpion? If you then, being evil, know how to give good gifts to your children, how much more will your Father from heaven give the good Spirit to them that ask him?” (St. Luke 11:11-13)
Some take the reference to asking the father for bread as a reference to the Eucharist. One version of the Our Father reads, “Give us this day our supersubstantial bread.” The fish might also be a reference to Christ, per the well-known acrostic symbolism of “ichthys.” I wouldn’t know what to make of the egg, though.