BT Tan 6b(30) :טובה דשתה דטבת מנ{{י}}וולתא‏ : fortunate is the year that Tevet is 'disfigured' (due to mud)
See the entire entry for ṭbt n.m. Tevet (December/January)

BT Tan 6b(30) :טובה דשתה דטבת מנ{{י}}וולתא‏ : blessed is the year when Tebet is disfigured (with rain)
See the entire entry for mnawwal adj. disfigured