Matthew
Matthew 13:30ESV·traditional attribution

Let both grow together until the harvest, and at harvest time I will tell the reapers, “Gather the weeds first and bind them in bundles to be burned, but gather the wheat into my barn.”’”

Matthew Henry Presbyterian @wholebiblehenry

In these verses, we have, I. Another reason given why Christ preached by parables, Mat 13:34, Mat 13:35. All these things he spoke in parables, because the time was not yet come for the more clear and plain discoveries of the mysteries of the kingdom.

Commenting on Matthew 13:24-43

John Gill Reformed Baptist @doctorgill

Which indeed is the least of all seeds,.... So mustard with the Jews (u), is called , "a kind of seeds"; and being very small, hence "as a grain of mustard", is often used, proverbially (w), for the least thing, as it is by Christ, Mat 17:20.

Albert Barnes Presbyterian @notesbybarnes

Verse 30. Let both grow together. They would not spoil the true wheat; and in time of harvest it would be easy to separate them. Our Saviour teaches us here, (1.) that hypocrites and deceived persons must be expected in the church. (2.) That this is the work of the enemy of man.