כַּצִּפּ֣וֹר לָ֭נוּד כַּדְּר֣וֹר לָע֑וּף כֵּ֥ן קִֽלְלַ֥ת חִ֝נָּ֗ם לא [ל֣וֹ] תָבֹֽא׃
Rashi on Proverbs
Like a wandering sparrow that wanders and like a swallow that returns to its nest, so...
Rashi on Proverbs
will a vain curse come home to the one who uttered it with his mouth.
Rashi on Proverbs
swallow Heb. דרור. This is the bird known as arondele in Old French, [hirondelle in modern French, schwalbe in German,] which is called דרור, because it lives (דר) in a house as in a field.