The old and the good
By analogy: that which is known and familiar, which has already proven itself in the past.
(Modern Hebrew)
Translation
Expression (Hebrew)
הַיָּשָׁן וְהַטּוֹב
Definition (Hebrew)
בְּהַשְׁאָלָה: הַמֻּכָּר וְהַיָּדוּעַ שֶׁכְּבָר הוֹכִיחַ אֶת עַצְמוֹ בֶּעָבָר.
(הָעִבְרִית הַחֲדָשָׁה)