א,טו [טז] רבן גמליאל אומר, עשה לך רב, והסתלק מן הספק; ואל תרבה לעשר אומדות.
Rabban Gamiliel says, make for yourself a Rav and withdraw from doubt. And do not add onto your tithes through estimation.
Judaism does not ask us to obey its rules through extremes. One should pay what one owes, but no more. There is no benefit in bankrupting oneself. We should give (to our religious institutions and to the needy), but not give so much as to harm ourselves.