A.T. Robertson Commentary Mark 12:2

"And at the season he sent to the husbandmen a servant, that he might receive from the husbandmen of the fruits of the vineyard." — Mark 12:2 (ASV)

At the season (τω καιρω). For fruits as in the end of the sentence.

A servant (δουλον). Bondslave. Matthew has plural.

That he might receive (ινα λαβη). Purpose clause with second aorist subjunctive. Matthew has infinitive λαβειν, purpose also.

Wounded in the head (εκεφαλιωσαν). An old verb (κεφαλαιω), to bring under heads (κεφαλη), to summarize. Then to hit on the head. Only here in the N.T.