yitzyshalom – I know the Rambam. I was trying to condense it (as it wasn’t my main point) and not be a troll (i.e. be tactful) at the same time. But kudos to you for elaborating. 🙂
ItcheSrulik – He does, in two places:
Teshuva 3:8
???? ?? ??????? ?????????… ??? ????? ?????? ???? ???? ???? ??, ??????? ?????? ???? ???? ???????
Mamrim 3:1
?? ????? ????? ????? ???? ??, ???? ??? ???? ????? ?????, ??? ??? ??? ???? ??????????
I’ve blogged about this, if you want to utilize your googling powers.