δίστιχον

From LSJ

ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm

Source

Russian (Dvoretsky)

δίστῐχον: τό дистих, двустишие (обычно из одного гексаметра и одного пентаметра) Anth.