Commentaries:
Robertson's Word Pictures (NT)
His servants (touv doulouv autou). These slaves are distinguished from
the husbandmen (gewrgoi, workers of the soil) or workers of the vineyard who had leased it from the householder before he went away. The conduct of the husbandmen towards the householder's slaves portrays the behaviour of the Jewish people and the religious leaders in particular towards the prophets and now towards Christ. The treatment of God's prophets by the Jews pointedly illustrates this parable.
Other Robertson's Word Pictures (NT) entries containing Matthew 21:34:
Mark 12:1
Luke 20:10
DISCLAIMER: Church of the Great God (CGG) provides these resources to aid the individual in studying the Bible. However, it is up to the individual to "prove all things, and hold fast to that which is good" (I Thessalonians 5:21). The content of these resources does not necessarily reflect the views of CGG. They are provided for information purposes only.