כַּצִּפּ֣וֹר לָ֭נוּד כַּדְּר֣וֹר לָע֑וּף כֵּ֥ן קִֽלְלַ֥ת חִ֝נָּ֗ם לא [ל֣וֹ] תָבֹֽא׃
As the wandering sparrow, as the flying swallow, So the curse that is causeless shall come home. .
Read kabbalistic (mystical) interpretation of Proverbs 26:2: and classical mystical sources.