וְאִם־תֵּֽלְכ֤וּ עִמִּי֙ קֶ֔רִי וְלֹ֥א תֹאב֖וּ לִשְׁמֹ֣עַֽ לִ֑י וְיָסַפְתִּ֤י עֲלֵיכֶם֙ מַכָּ֔ה שֶׁ֖בַע כְּחַטֹּאתֵיכֶֽם׃
And if ye walk contrary unto Me, and will not hearken unto Me; I will bring seven times more plagues upon you according to your sins.
Find Mishnaic references to Leviticus 26:21: , passages from the 63 tractates of the Mishnah.