Give not that which is holy unto the dogs, neither cast ye your pearls before swine, lest they trample them under their feet, and turn again and rend you. Matthew 7:6 Again, the kingdom of heaven is like unto a merchant man, seeking goodly pearls: Matthew 13:45 And the twelve gates were twelve pearls; every several gate was of one pearl: and the street of the city was pure gold, as it were transparent glass. Revelation 21:21.