Augustine of Hippo
Catena Aurea · Matthäusevangelium 5
For I say unto you, That except your righteousness shall exceed the righteousness of the Scribes and Pharisees, ye shall in no case enter into the kingdom of heaven. Ye have heard that it was said by them of old time, Thou shalt not kill; and whosoever shall kill shall be in danger of the judgment: But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire.
(ubi sup.) In all these three sentences there are some words understood. In the first indeed, as many copies read without cause, there is nothing to be supplied. In the second, He who saith to his brother, Racha, we must supply the words, without cause; and again, in He who says, Thou fool, two things are understood, to his brother, and, without cause. And this forms the defence of the Apostle, when he calls the Galatians fools, though he considers them his brethren; for he did it not without cause.