(And they say) i.e. the Jews: (Hellfire will not touch us save for a certain number of days) only for 40 days, the number of days in which our forefathers worshipped the calf. (Say) O Muhammad: (Have ye received a covenant from Allah) for what you are saying-(truly Allah will not break His covenant) if indeed you have a covenant with Allah-(or tell ye) or do you indeed tell (concerning Allah that which ye know not?) that which you know does not exist in your Book?