"And Israel was greatly impoverished" (Judges 6:6) - so much so that they had nothing with which to bring a meal-offering, as it is written, "And if he be poor" (Leviticus 14:21).
Israel Brought So Low They Could Not Bring an Offering
Yalkut Shimoni on Nach 60:3
וידל ישראל מאד שלא היה להם להקריב מנחה דכתיב (ח) ואם דל הוא: