πρὸς μητρός μητρόθεν

From LSJ

Σιγᾶν ἄμεινον ἢ λαλεῖν, ἃ μὴ πρέπει → Decet tacere quam loqui, quae non decet → Schweig besser still, als dass du sagst, was du nicht darfst

Menander, Monostichoi, 484

Greek > English (Woodhouse)

on the mother's side