Mattityahu 6:21-23

Orthodox Jewish Bible

²¹ For where your otzar (treasure) is, there also will be your lev (heart).

²² The eye is the menorah of the basar. Therefore, if your eye is unblurred, then your whole basar will be lighted.

²³ But if yours is the ayin horo (evil eye), your whole basar will be in choshech (darkness).