BT Tan 3b(45) :מיטרא ניחא לפירי‏ : gentle rain (is beneficial) for fruit
See the entire entry for nīḥ adj. calm; easy

BT Tan 3b(45) :מיטרא רזיא לאילני‏ : violent rain is for the trees
See the entire entry for rzē adj. chafing, violent