Midrasch zu Schoftim 20:16

“For there is not a righteous man upon the earth, who does good, and does not sin” (Ecclesiastes 7:20).
“For there is not a righteous man upon the earth who does good, and does not sin.” Rabbi Yudan said: Is there a righteous man who sins? These are the charity collectors and the charity distributors; [they give to [those who are deserving what should be given to] the undeserving, and they give to the undeserving [what should be given to] the deserving. “And does not sin [yeḥta],” just as you say: “Each one could sling stones at a hair, and not miss [yaḥti]” (Judges 20:16).¹²³The term “sin” here should not be interpreted to mean a spiritual failing, as there is no way to always determine who is most deserving. It is used in the sense of one who aims at a target and misses. Therefore, one should not refrain from charity due to the concern that one may distribute it to those who are not most deserving.