John Gill Reformed Baptist @doctorgill

And when the time of the fruit drew near,.... Of gathering the fruit, when it was ripe, and might be eaten, or profit made of it, according to the law in Lev 19:23. The fruit of all manner of trees, for the first three years, was uncircumcised; it was not to be eaten, nor any profit made of it, and on the fourth year it...

Albert Barnes Presbyterian @notesbybarnes

Verse 34. And when the time of the fruit drew near, etc. The time of gathering the fruit. The vineyard was let out, probably for a part of the fruit, and the owner sent to receive the part that was his. Sent his servants. These doubtless represent the prophets sent to the Jewish people. (w) "servants"

Jamieson-Fausset-Brown Reformed @jfbcommentary

And when the time of the fruit drew near, he sent his servants to the husbandmen--By these "servants" are meant the prophets and other extraordinary messengers, raised up from time to time. See on Mat 23:37. that they might receive the fruits of it--Again see on Luk 13:6.