Parallel
Matthew 20:10
Robinson-Pierpont Byzantine Textform · Berean Standard Bible
Ἐλθόντες δὲ οἱ πρῶτοι ἐνόμισαν ὅτι πλείονα λήψονται· καὶ ἔλαβον καὶ αὐτοὶ ἀνὰ δηνάριον.
So when the original workers came, they assumed they would receive more. But each of them also received a denarius.