Thomas Aquinas,
Summa Theologiae — Question 74 - OF TALE-BEARING…
“ A tale-bearer is called a backbiter in so far as he speaks ill of another; yet he differs from a backbiter since he intends not to speak ill as such, but to say anything that may stir one man against another, though it be good simply, and yet has a semblance of evil through being unpleasant to the hearer. ”
