Mishna, Pe'ah 8:8

One who has 200 zuzim should not take leket (gleanings), shikhaha (forgotten sheaves), pe’ah (corners of the field) and ma’aser oni (tithe for the poor). If one has one dinar (equal to two zuzim) less than 200 zuzim, even if 1000 people give to her, she may take from all of them. [One whose 200 zuzim] are owed to a creditor or to his wife’s ketubah may take. We do not obligate one to sell their house or vessels (in order to acquire the 200 zuzim that would disqualify one from taking from the leket, etc.) [Translation by Rabbi Jill Jacobs. Edited for gender neutrality]