Adam Clarke on Luke 12:46

With the unbelievers - Or, rather, the unfaithful; των σπιϚων. Persons who had the light and knowledge of God's word, but made an improper use of the privileges they received. The persons mentioned here differ widely from unbelievers or infidels, viz. those who were in a state of heathenism, because they had not the revelation of the Most High: the latter knew not the will of God, Luk 12:48, and, though they acted against it, did not do it in obstinacy; the former knew that will, and daringly opposed it. They were unfaithful, and therefore heavily punished.