εἰς κακὸν αὑτὸν ἐμβάλλειν

From LSJ

Γονεῖς δὲ τίμα καὶ φίλους εὐεργέτει → Reverens parentum sis, amicis beneficus → Die Eltern ehre, deinen Freunden tue wohl

Menander, Monostichoi, 105

Greek > English (Woodhouse)

get oneself into trouble