Bechukotai, Chapter 5
1) (Vayikra 26:18) ("And if with these you do not hearken to Me, then I shall chastise you even more, seven-fold for your sins.") "with these" ("ad eileh"). R. Eliezer says: The Holy One does not bring calamity to Israel until he testifies ("me'id" [similar to" ad]) against them first, as it is written "And if ad eileh." R. Yehoshua says: Let Israel not say "The plagues have ended and He has no other to bring upon us"; it is, therefore, written "And if ad eileh" — still ("od [similar to "ad"]) I have others of these and like these to bring. Then I shall chastise you even more, seven-fold for your sins.": You transgressed seven transgressions ("not learning, not doing, etc.," viz. Section 2:3 above) — come and take upon yourselves seven calamities, (which follow).