The Apostle Paul
Galatians 1:9BSB·traditional attribution

As we have said before, so now I say again: If anyone is preaching to you a gospel contrary to the one you received, let him be under a curse!

John Calvin Reformed @genevareformer

9. As we said before. Leaving out, in this instance, the mention of himself and of angels, he repeats the former assertion, that it is unlawful for any man to teach anything contrary to what they had learned. “D’enseigner autre doctrine que cello qu’il avoit enseignee aux Galatiens.” “To teach any other doctrine than that which he had taught to the Galatians.” Observe the expression...

Matthew Henry Presbyterian @wholebiblehenry

Here the apostle comes to the body of the epistle; and he begins it with a more general reproof of these churches for their unsteadiness in the faith, which he afterwards, in some following parts of it, enlarges more upon. Here we may observe, I. How much he was concerned at their defection: I marvel, etc. It filled him at once with the greatest surprise and sorrow.

Commenting on Galatians 1:6-9

John Gill Reformed Baptist @doctorgill

As we have said before, so say I now again,.... Either when he first preached the Gospel among them; or rather referring to what he had just now said, which he repeats with some little alteration; as if any, men, or angels, be they of what name, figure, rank, or office whatever, preach any other Gospel unto you, than that ye have received; and as...