'Owner' in the Bible

And He addressed them thus: "The harvest is abundant, but the reapers are few: therefore entreat the Owner of the harvest to send out more reapers into His fields. And now go.

Then the owner of the vineyard said, "'What am I to do? I will send my son--my dearly-loved son: they will probably respect him.'

"So they turned him out of the vineyard and murdered him. What then will the owner of the vineyard do to them?